HandWar is an innovative browser-based take on the classic Rock–Paper–Scissors game, designed for fast-paced, real-time gameplay. This lightweight prototype focuses on instant play, smooth animations, and quick matchmaking, allowing players to challenge friends or be paired with random opponents in real time. The game is scalable, starting with the original RPS set but structured to allow new themes, elements, or game modes to be added without altering the core logic. Key Features include real-time 1v1 gameplay, a simple and responsive UI, animated hand gestures for each choice, instant result calculation and display, and a quick matchmaking system. The tech stack comprises Vite, React, and Tailwind CSS for the frontend, with Firebase providing real-time multiplayer capabilities and hosting for quick deployment and minimal backend setup.