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Stack & Sus is a physics-based social deduction party game for 3–6 players that blends cooperative cooking with hidden betrayal. At the start of each round, players are secretly divided into two teams: the Staff, who aim to build a towering burger that satisfies the customer's order, and the Spies, who work to sabotage the dish while maintaining their cover. The tension emerges from the asymmetric goals—everyone places ingredients together, but not everyone wants the same outcome.

Gameplay revolves around purchasing ingredients from a shopping street each round, then stacking them onto a shared burger. The physics-based mechanics make this deceptively challenging: ingredients like whole beef are heavy, shrimp springs bounce unpredictably, cherry tomatoes roll away, banana peels are dangerously slippery, and pizza or pineapple explode on contact. Success requires both structural stability and meeting the customer's specific criteria—height, width, ingredient variety, and ingredient preferences all factor into the satisfaction meter. Dropped ingredients and disliked toppings count against you, and the target becomes stricter with each successful round.

The social deduction layer drives replayability and humor. After each round, players vote on who they trust most, granting that player priority placement in the next round. Was that wobbly stack an honest mistake or deliberate sabotage? The debate and accusation that follow are central to the experience. With its retro visual charm and straightforward mechanics paired with emergent social gameplay, Stack & Sus appeals to party game enthusiasts, social deduction fans, and anyone seeking couch co-op chaos with friends.

Developed by uracon and published by ENJOYN GAMES (Takara Tomy's new indie label), Stack & Sus launches on Steam with support for English, Japanese, Simplified Chinese, Traditional Chinese, and Korean.