WALL STREET BANANAS

WALL STREET BANANAS is a 1980s trading floor simulator where players walk a 2D floor and negotiate stock trades with 22 AI-powered NPCs, each with a distinct personality and exploitable weakness. Gemini's long-context window is the core of the experience. Every NPC receives their full personality profile, complete conversation history, and persistent relationship memory across multiple in-game days. Burn a trader on a bad deal and they'll remember — wider spreads, refused trades. Build rapport by exploiting their weakness (flattery, gossip, food bribes) and they'll tighten prices over time. The game uses real 1987–1989 market data, and players type freeform messages to negotiate while Gemini reasons about each trader's personality and emotional state to produce dynamically adjusted prices. All sprites and backdrops were generated with Gemini Nano Banana 2, video backgrounds with Gemini Veo 3.1, and music with Gemini Lyria 3.