Design a player-driven virtual marketplace with auction systems, trade mechanics, anti-fraud measures, and economic controls that create a thriving in-game trading economy.
## ROLE You are a virtual economy architect who designs player-to-player trading systems for online games. You understand auction theory, market manipulation prevention, real-money trading (RMT) countermeasures, and how to build marketplaces that add value to the game experience while maintaining economic stability. ## OBJECTIVE Design a virtual marketplace for [GAME TYPE: e.g., MMO, trading card game, survival game] that enables player-to-player trading of [TRADEABLE ITEMS: e.g., equipment, resources, cosmetics, cards] while preventing fraud, manipulation, and RMT exploitation. ## TASK ### Marketplace Architecture - Auction house: listed items with buy-it-now and bidding options - Direct trade: peer-to-peer item exchange with confirmation windows - Buyout shop: fixed-price listings for quick transactions - Commodity market: fungible items (resources, materials) with order book system - Currency exchange: if multiple currencies exist, an exchange with floating rates ### Listing and Pricing - Listing fee: small upfront cost to list (prevents spam listings) - Transaction tax: 5-15% cut on completed sales (primary currency sink) - Listing duration: 24h, 48h, or 7-day options with different fees - Price floors and ceilings: optional bounds to prevent extreme manipulation - Price history: visible chart showing average sale price over time - Suggested pricing: algorithm-driven price suggestion based on recent sales ### Search and Discovery - Category navigation: item type, rarity, level requirement, stat ranges - Advanced filters: specific stats, price range, seller rating, time remaining - Saved searches: notify player when matching items are listed - Featured listings: promoted visibility for a premium fee - Recently sold: transparency on actual transaction prices ### Trading Mechanics - Trade window: both players see and confirm items before execution - Escrow system: items held during auction period, returned if not sold - Mail-based delivery: items delivered via in-game mail after purchase - Cross-server trading: if applicable, how trades work across server boundaries - Trade history: complete log of all transactions for both parties ### Anti-Fraud Measures - Trade confirmation delay: 5-second countdown to prevent accidental or rushed trades - Item verification: tooltip comparison showing item stats before confirming - Scam reporting: easy-to-use report function with investigation workflow - Account age requirement: minimum account age or level before marketplace access - Trade limits: daily transaction caps for new accounts, increasing with account age - Duplicate detection: flag suspicious patterns like selling the same item back and forth ### Anti-Manipulation Controls - Wash trading detection: identify accounts trading between themselves to inflate prices - Market cornering prevention: limits on buying large quantities of single items - Price manipulation alerts: automated detection of unusual price movements - Shill bidding detection: identify bid patterns from related accounts - Cross-account transaction monitoring: detect multi-account economic exploitation ### RMT Prevention - Gold selling detection: unusually large currency transfers between unrelated accounts - Botting indicators: unnatural farming patterns feeding into marketplace listings - Account trade monitoring: items or currency moving from high-level to new accounts - Enforcement: temporary trade bans, currency removal, account suspension for violations - Legitimate alternatives: official premium currency and trading options to reduce RMT demand ### Economic Integration - How the marketplace interacts with the broader game economy - Impact on crafting: does player trading make crafting obsolete or complement it - Impact on drops: does easy access to traded items reduce incentive to play content - Bind-on-equip: items become untradeable once used, maintaining drop incentive - Crafted items: soulbound vs tradeable crafted goods and the economic implications ## OUTPUT FORMAT Complete marketplace design document with architecture, UI wireframe descriptions, anti-fraud systems, and economic integration analysis. ## CONSTRAINTS - Marketplace must not become the primary gameplay loop (playing the market instead of the game) - Transaction fees must be meaningful enough to function as a currency sink - New player protection: prevent experienced players from exploiting newcomers - Privacy: trade history visible to the account holder but not publicly to other players - System must handle server lag gracefully: no lost items during high-traffic trades
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