Wavu

Wavu is a Tekken-style 3D fighter built around one of the genre's hardest techniques, the Mishima Wind God Step. Unity renders it, but Unity does not run the fight: the match is a separate simulation package with no engine dependency, and the game only draws what that simulation says.

That split exists because of rollback netcode. When a remote input arrives late, the game rewinds to the frame it applies to and re-simulates forward, possibly several times a second. That only works if the simulation is perfectly deterministic, so every number in it is Q47.16 fixed point — the only non-trivial function is an integer square root — and a full match state can be cloned, restored and checksummed.

Rendering follows the same rule. Unity's Animator never runs on its own clock; every frame, a fighter's pose is sampled as "clip X at frame N" from the simulation state. A rollback therefore always shows the correct pose, and the animations are authored so that a correction a few frames late reads as a slightly quicker start rather than a teleport.

The browser build plays the same as the desktop one, including online. Browsers cannot open UDP sockets, so a Cloudflare Worker pairs players by lobby code — each lobby is a Durable Object — and passes the WebRTC handshake between them. Game packets then travel directly between the two browsers over an unordered, unreliable data channel, falling back to a relay only when a direct path is impossible.