# 🎮 Mobile Idle RPG — Game Economy Design Document > **Game Type:** Mobile Idle RPG | **Target Player:** Casual Mobile Gamers | **Model:** Free-to-Play | **Core Loop:** Battle · Collect Loot · Upgrade Heroes --- ## 🎮 1. Economy Overview ### Economy Concept Summary The game economy is built on a **transparent, player-first design philosophy**. Currencies flow naturally through gameplay, progression feels rewarding at every stage, and optional purchases accelerate — never gate — meaningful content. The core promise to every player: **skill and time investment are always respected.** Three interlocking currencies create a layered economy: an abundant primary currency for everyday decisions, a scarce secondary currency for milestone choices, and a premium currency that can be earned for free and spent only on non-power items. > 💡 **Design Philosophy:** Every currency gate should feel like a natural pause for reflection, not a wall requiring a credit card. Purchases should shorten grind — never be the only path to content. ### Primary Player Motivation | Motivation | Description | |---|---| | **Power Fantasy** | Watching heroes grow from frail recruits into legendary champions through player investment | | **Collection Drive** | A diverse roster of heroes with unique skills triggers the completionist instinct | | **Idle Satisfaction** | Returning to accumulated rewards reinforces positive session loops even for low-frequency players | | **Competitive Ranking** | Optional leaderboards give aspiring players a goal without forcing pay-to-win dynamics | --- ## 💰 2. Currency System Design ### Currency Overview | Currency | Type | Earn | Spend | |---|---|---|---| | ⚔️ **Gold** | Primary | Battles, idle income, quests, dungeons | Hero upgrades, equipment crafting, building upgrades | | 💎 **Soul Shards** | Secondary | Dungeon clears, weekly challenges, achievements | Hero rank-ups, elite skill unlocks, rare equipment slots | | 👑 **Gems** | Premium | Daily login, story chapters, events, optional purchase | Battle passes, cosmetics, inventory slots, energy refills | --- ### ⚔️ Gold — Primary Currency **How Gold is Earned:** - **Idle Income:** 100–5,000 Gold/hour based on hero power level (auto-collected on session open) - **Manual Battles:** 50–800 Gold per battle, scaling with enemy difficulty - **Daily Quests:** 200–600 Gold per quest (3 quests available per day) - **Dungeon Runs:** 500–2,500 Gold per dungeon (2 free entries/day) - **Achievement Packs:** Lump-sum Gold rewards for completing milestone achievements **How Gold is Spent:** - **Hero Upgrades:** Primary Gold sink — costs scale exponentially to prevent early hoarding - Level 1–10: cheap and fast - Level 11–30: moderate investment - Level 31+: significant decisions required - **Equipment Crafting:** Spend Gold + materials to craft gear for heroes - **Building Upgrades:** Gold invested in barracks, forges, and towers boosts passive production --- ### 💎 Soul Shards — Secondary Currency **How Soul Shards are Earned:** - **Dungeon Clears (first-time):** 50–200 Shards per new dungeon cleared - **Weekly Challenge Completion:** 300 Shards for completing all weekly goals - **Prestige Rewards:** Shards granted upon hero prestige (deliberate reset for power boost) - **Limited Event Stores:** Events include Shard rewards for participation milestones **How Soul Shards are Spent:** - **Hero Rank-Up:** Promote a hero beyond base cap (costs ramp: 100 → 300 → 800 Shards) - **Elite Skills:** Unlock a hero's ultimate passive ability (one-time per hero: 500 Shards) - **Rare Equipment Slots:** Unlock a 4th equipment slot per hero (200 Shards) --- ### 👑 Gems — Premium Currency > ⚠️ **Key Anti-Pay-to-Win Rule:** Gems **never** purchase stat-boosting content unavailable to free players. Gems buy time-saving conveniences, cosmetics, and quality-of-life upgrades. No exclusive power-gating. **How Gems are Earned (Free):** - **Daily Login:** 5 Gems/day (~150/month free baseline) - **Story Chapter Completion:** 20–50 Gems per chapter cleared - **Special Events:** 30–100 Gems from seasonal events - **Achievement Chains:** Gem bonuses for completing achievement tracks **How Gems are Spent:** - **Battle Pass (optional):** 500 Gems/season — unlocks cosmetics, bonus event currencies, hero portrait. No stat advantages. - **Cosmetic Skins:** 200–400 Gems per hero skin (visual only) - **Inventory Expansion:** +5 hero slots for 100 Gems (QoL, not power) - **Emergency Energy Refill:** 50 Gems for 1 dungeon entry (capped at 3 purchases/day to prevent whale spiraling) --- ## 🎁 3. Reward System Structure ### Daily Rewards | Reward Type | Content | Design Intent | |---|---|---| | Day 1 Login | 500 Gold + 5 Gems | Immediate win to reinforce return habit | | Day 3 Streak | 1,000 Gold + 1 Hero Token | Mid-week engagement hook | | Day 7 Streak | 2,500 Gold + 150 Soul Shards + 1 Epic Hero Fragment | Weekend return reward | | Day 30 Streak | 5,000 Gold + 300 Shards + 1 Full Hero Unlock | Monthly loyalty milestone | | Daily Quests | 200–600 Gold per quest (3/day) | Active engagement beyond idle loop | ### Progression Rewards - **Battle Stage Clears:** Gold + equipment materials on first-time clears, reduced on repeats - **Boss Defeats:** Guaranteed rare loot drop with a small chance of epic item - **Dungeon Tier Completions:** Soul Shards + a hero fragment on first completion - **Chapter Completions:** Gems + narrative unlocks (cut-scenes, hero backstories) ### Achievement Rewards | Achievement | Reward | |---|---| | First 10 Battles Won | 500 Gold + Starter Hero | | First Hero to Level 20 | 1,000 Gold + Rare Equipment Chest | | Defeat 1,000 Enemies | 2,000 Gold + 100 Soul Shards | | Complete All Daily Quests (7 days) | 300 Shards + Exclusive Hero Portrait Frame | | Collect 10 Unique Heroes | 5,000 Gold + 1 Epic Hero Fragment | | Clear All Chapter 1 Dungeons | 200 Gems + Dungeon-Specific Title | ### Special Event Rewards - **Seasonal Events (4×/year):** Limited hero fragments, event currency, exclusive cosmetics — all earnable by free players within the event duration - **Community Milestones:** If the entire playerbase reaches a collective goal, all players receive a bonus reward (builds social cohesion) - **Double-Drop Weekends:** Friday–Sunday, certain dungeons drop 2× materials. No purchase required. ### Long-Term Milestone Rewards - **Prestige System (every 6 months of active play):** Hero prestige adds a permanent global power multiplier (+5%), rewarding long-term commitment - **Annual Login Rewards:** Players who maintain streaks over 365 days unlock a legendary hero not available by any other means - **Guild Loyalty Rewards:** Players in a guild for 30+ days receive exclusive guild crest cosmetics --- ## 📈 4. Progression Economy ### Early-Game Progression (Days 1–14) > 🎯 **Design Goal:** Fast, satisfying wins that teach systems without overwhelming new players. Every session should end with a clear achievement. - Hero levels 1–15 cost minimal Gold (~50–500/upgrade) — rapid power growth feels great - Story dungeons open every 1–2 days of progression, giving continuous new content - Starter hero kit: 3 heroes given free in tutorial — enough for early battle diversity - First-week daily quest rewards are 2× to hook players into the return habit - No energy caps in first 3 days — new players explore freely before systems are introduced ### Mid-Game Progression (Days 15–60) - Hero upgrade costs increase meaningfully (500–5,000 Gold/upgrade) — decisions begin to matter - Soul Shards become relevant as players approach hero rank-up gates - Dungeon energy system (2 free/day) creates natural session pacing — no frustrating hard walls - Guild system unlocks at Day 15 — adds a social layer and cooperative goals - Equipment crafting opens: Gold + materials create build diversity, deepening engagement ### Late-Game Progression (Day 60+) - Prestige system offers a meaningful long-term goal for dedicated players - Weekly Challenges and ranked leaderboards provide competitive targets - Hero synergies become strategic — roster composition matters more than raw level - Endgame dungeons require team optimization, not just resource dumping - Content update cadence: new heroes, dungeons, and events added every 4–6 weeks ### Resource Flow Recommendations | Phase | Primary Resource Flow | Key Balancing Note | |---|---|---| | Early (D1–14) | Gold in → Hero upgrades out | Keep costs low, drain fast to feel satisfying | | Mid (D15–60) | Gold + Shards → Equipment + Ranks | Introduce meaningful choices between upgrades | | Late (D60+) | All currencies → Prestige + Endgame | Shard scarcity creates healthy progression pacing | ### Progression Pacing Suggestions - **Rule of 3:** A player should always have 3 meaningful things to do — a short task, a medium task, and a long-term goal. Prevents both boredom and overwhelm. - **2-Day Rule:** New systems should unlock every 2 days in the first 30 days — sustains curiosity and onboarding momentum. - **Power Spike Moments:** Schedule deliberate "wow" moments (first boss defeat, first hero rank-up, first dungeon unlock) — these become memorable emotional anchors. --- ## ⚖️ 5. Economy Balance Analysis ### Potential Inflation Risks - **Gold Oversupply:** If idle income scales too fast, Gold becomes meaningless. - *Mitigation:* Upgrade costs scale exponentially; introduce Gold sinks (temporary buffs, cosmetic upgrades, guild donations) - **Event Currency Flooding:** Seasonal events can dump too much currency at once. - *Mitigation:* Cap event currency conversions to prevent stockpiling that destabilizes future balancing ### Resource Bottlenecks - **Soul Shard Scarcity (intentional):** Shards are rare by design — this creates meaningful hero investment decisions. But scarcity should never feel unfair. - *Solution:* Guarantee a minimum of 300 Shards/month through reliable, predictable sources - **Equipment Material Bottleneck:** Material drops can create upgrade frustration. - *Solution:* Add a crafting conversion system — 5 common materials = 1 uncommon — so players always have agency ### Reward Balancing Concerns - **Daily Reward Fatigue:** Over-rewarding daily logins can devalue the reward. - *Solution:* Introduce "surprise bonus days" every 15 days with higher-value rewards to spike excitement - **Achievement Obsolescence:** Early achievements become trivial fast. - *Solution:* Retroactively grant achievements to veteran players when new achievements are added ### Player Motivation Factors | Motivation Type | Supported By | Risk If Missing | |---|---|---| | **Progress (Achiever)** | Upgrade levels, chapter clears | Players feel stuck → churn | | **Exploration (Explorer)** | New dungeons, hero lore | Game feels shallow → boredom | | **Social (Socializer)** | Guilds, leaderboards | Isolation → no retention hook | | **Competition (Killer)** | Ranked arena, seasonal rankings | No endgame for dedicated players | --- ## 🛒 6. Monetization Integration > 💡 **Core Monetization Principle:** Players who spend money should feel generous, not advantaged. Payers fund the game's existence; free players create the community that makes the game worth playing. --- ### Approach 1: Battle Pass System **Structure:** $4.99–$9.99/season (6 weeks) **Benefits:** - Predictable monthly revenue for the studio - Players get a clear value proposition upfront — they know exactly what they're buying - Free track ensures all players engage with the event; paid track is a bonus, not a gate - Cosmetics and XP boost items (not stat boosts) drive perception of value **Risks:** - Season fatigue if content quality drops — players cancel rather than renew - Must ensure free-track rewards remain genuinely satisfying, not artificially nerfed **Player Experience:** Positive when transparent. Players appreciate knowing what they're getting vs. gambling on loot boxes. --- ### Approach 2: Cosmetic Shop **Structure:** $1.99–$9.99 per item **Benefits:** - Zero impact on gameplay balance — no pay-to-win risk - High-quality art creates genuine desire (FOMO without predatory mechanics) - Supports a long-term catalogue that generates revenue indefinitely **Risks:** - Revenue is inconsistent and depends heavily on art quality and content cadence - Limited-time cosmetics can feel manipulative if scarcity is artificial **Player Experience:** Strongly positive — players respect and actively support cosmetic-only shops when they trust the developer's fair-play commitment. --- ### Approach 3: Convenience Bundles **Structure:** $0.99–$4.99 starter/value packs **Benefits:** - Low price point converts casual payers who wouldn't spend $10 upfront - Bundles (Gold + Gems + Shards) feel like a deal, increasing conversion rate - One-time offers (first purchase bonus) incentivize initial conversion **Risks:** - Slippery slope: bundles can drift toward P2W if they include exclusive resources - Must strictly limit to currencies players could earn through normal play — just faster **Player Experience:** Acceptable if framed honestly: *"Skip 3 days of grinding"* — not *"Unlock content."* --- ## 🔄 7. Retention & Engagement Loops ### Daily Engagement Systems - **Morning Check-In:** Idle reward notification brings players back within the first session of each day (soft push, not intrusive) - **Daily Quest Refresh:** 3 quests reset at midnight — completing all 3 gives a bonus chest - **Flash Events:** Random 2-hour bonus events (2× Gold, 2× drops) with a notification — creates urgency without manipulation - **Guild Activity Feed:** Seeing guildmates progress motivates social players to return daily ### Long-Term Retention Mechanics - **Hero Collection:** 50+ heroes at launch, new ones added monthly — ongoing collection goal sustains interest for years - **Prestige Loop:** Resetting a hero for a permanent multiplier is a powerful "fresh start" retention mechanic - **Seasonal Arcs:** 6-week narrative story arcs give players a reason to engage beyond grinding - **Comeback Mechanic:** Players returning after 7+ days receive a "We Missed You!" bundle with boosted idle rewards — reduces churn from breaks ### Collection & Progression Loops | Loop Type | Mechanic | Frequency | |---|---|---| | **Micro Loop** | Battle → Gold → Upgrade hero | Every 5–10 min | | **Session Loop** | Complete daily quests, dungeon runs | Every play session | | **Daily Loop** | Login reward, quest refresh, idle collect | Once per day | | **Weekly Loop** | Weekly challenge completion | Once per week | | **Seasonal Loop** | Battle pass, event progression | Every 6 weeks | | **Long-Term Loop** | Hero collection, prestige, leaderboard rank | Months of play | ### Social & Competitive Elements - **Guilds:** Up to 30 players — cooperative boss raids, guild-exclusive rewards, in-game chat - **Leaderboards:** Weekly (resets — fair for all) and all-time (prestige for veteran players) - **Friend System:** View friends' hero rosters, send/receive daily gifts (Gold, basic materials) - **Guild Wars (mid-game unlock):** Inter-guild competition for exclusive cosmetic trophies — no stat rewards to maintain fairness --- ## 🚀 8. MVP Economy Plan ### Essential Economy Systems for Launch 1. Gold currency system + hero upgrade loop *(the core loop must work flawlessly)* 2. Daily login rewards — 7-day streak calendar minimum 3. Battle → loot → upgrade loop (tight, bug-free, satisfying) 4. Basic achievement system (10–15 achievements at launch) 5. Cosmetic shop with 5–8 hero skins at launch 6. Gem currency + one $4.99 starter pack offer ### Systems to Add Post-Launch | System | Recommended Timeline | |---|---| | Soul Shards + Hero Rank-Up System | Month 1–2 post-launch | | Guild System | Month 2 post-launch | | Battle Pass (first season) | Month 3 post-launch (after economy is stable) | | Dungeon Energy System | Month 1 (after core loop is validated) | | Seasonal Events | Month 3+ (requires content pipeline) | | Prestige System | Month 6+ (needs veteran player base) | | Ranked Arena / Leaderboards | Month 4+ (needs sufficient playerbase) | ### Simplification Opportunities - **Launch with Gold only:** Add Soul Shards in Month 1 to avoid currency overwhelm on Day 1 - **5 heroes at launch is enough:** A small, polished roster beats a large, unbalanced one - **Simplify daily quests to 3 clear goals:** "Win 5 battles, collect 1,000 Gold, upgrade 1 hero" — no ambiguity - **Skip Guild Wars at launch:** Basic guilds first, competitive guild modes later when the social graph is established --- ## 🚧 9. Economy Risks ### 5 Common Economy Design Mistakes — And How to Avoid Them **1. Runaway Inflation** - *What happens:* Gold floods the economy; upgrades feel meaningless; players lose their sense of value and progression. - *How to avoid:* Design multiple Gold sinks (upgrades, crafting, temporary buffs). Monitor average player Gold balance weekly post-launch and tune sinks accordingly. **2. Pay-to-Win Creep** - *What happens:* Monetization slowly adds stat-boosting purchases under pressure to hit revenue targets; community trust collapses permanently. - *How to avoid:* Establish a written internal policy — *"Purchased items never grant stats unavailable to free players."* Revisit quarterly. Never compromise under revenue pressure. **3. Power Curve Collapse** - *What happens:* Early-game power growth is too fast; mid-game feels like a sudden wall; players churn at the barrier before they're invested. - *How to avoid:* Graph upgrade costs vs. Gold income for Days 1–90 before launch. Ensure the curve is smooth. Test with real players in soft launch before wide release. **4. Reward Devaluation** - *What happens:* Overgenerous early rewards make later rewards feel small; players feel the game is getting worse over time even as they progress. - *How to avoid:* Plan reward values in a spreadsheet across 90 days. Rewards should stay consistent in value-per-session even as types change. Never reduce existing rewards. **5. Seasonal Event Burnout** - *What happens:* Too many back-to-back events feel obligatory; casual players feel perpetually behind and quit. - *How to avoid:* Maximum 1 major event per 6 weeks. Include catch-up mechanics. Never design events that require daily play to avoid permanently missing content. --- ## 🎯 10. Final Recommendations ### 🏆 Strongest Economy Feature: The Idle Return Loop The most powerful retention feature in the economy is the **idle Gold accumulation system**. Every session opening should feel like *"opening a gift"* — a pile of Gold accumulated while the player was away. This creates a strong habit loop with minimal cognitive overhead, which is perfect for casual mobile gamers. Invest heavily in making this moment visually satisfying (animated gold coin showers, number tickers, a satisfying sound cue) — it's your single most important retention tool. --- ### ⚠️ Biggest Balancing Challenge: Mid-Game Progression Pacing The most common failure point in idle RPG economies is the **mid-game cliff**: early progression is fast and rewarding, but Days 20–60 slow dramatically as costs scale without reward feel compensating. This is where most players churn. **Recommendation:** Build a dedicated "mid-game smoothing" playtest — recruit 20 testers and track their sentiment at Day 15, Day 30, and Day 45. If satisfaction drops, adjust the pacing formula before wide launch. This is your highest-risk window. --- ### 🔑 Most Important Next Design Step: Build the Economy Simulation Spreadsheet Before writing a single line of production code, **model the entire economy in a spreadsheet:** - Gold earn rates by source (battles, idle, quests) - Gold costs at each upgrade level - Days-to-afford each milestone - Shard accumulation rate over 90 days Run **"free player"** and **"light spender"** simulations side by side. If both paths reach meaningful milestones (even at different speeds), the economy is balanced. If the gap is too large, adjust before it's costly to fix. > This single tool will prevent more economy disasters than any other design practice. --- *Mobile Idle RPG — Game Economy Design Document* *Designed with a player-first, fair monetization philosophy*