Open Tournament is a first-person shooter game built on Unreal Engine, inspired by classic arena shooters like Unreal Tournament and Quake. The game implements comprehensive systems for player movement, combat, AI, user interface, audio, and networking. It features a modular architecture using Unreal Engine's plugin system, with extensive use of the Gameplay Ability System (GAS), Enhanced Input, and replication for multiplayer functionality. The codebase shows thoughtful architectural design in several reusable systems, particularly in settings management, UI composition, messaging, and loading screen handling.