Bug the Gathering
Offline-first mobile roguelike deckbuilder for iOS and Android, built with React Native and Expo. Build an IT-themed strategy through a procedural survival run.
About Project
BUG: The Gathering is a landscape mobile card roguelike inspired by Slay the Spire and Hearthstone. In The Sprint, players choose one of five IT-themed classes, build a deck, navigate a seeded map, and face combat encounters, events, shops, and multi-phase bosses. The game runs fully offline, with a pure TypeScript engine separating combat and procedural generation from its React Native presentation layer.
Key Features
- React Native and Expo application optimised for landscape mobile play
- Five playable classes and deck-building progression across roguelike runs
- Pure, deterministic combat and wave-generation engine separated from UI code
- Skia-powered cards, combat effects, animations, audio, and haptic feedback
- Local-first state management, English and Polish localisation, and automated Jest tests
Technical Challenges
The main engineering challenge is maintaining a responsive native battle interface while several visual effects and state transitions can occur in one turn. The solution keeps combat and progression logic deterministic and independent of rendering, while persistent Skia surfaces and carefully managed animation lifecycles minimise GPU and native-view churn on mobile devices.