True 3D FPS
Quake
The 1996 revolution — a fully 3D world full of grunts, ogres and shamblers. The shareware episode runs in your browser through DOSBox, warts and all.
Mouse look & shoot · ←↑↓→ / WASD move · Ctrl / Click fire · Space jump · 1–7 weapons · Ctrl+F10 release mouse
First load downloads the emulator and game (~8 MB) and caches them. Quake is heavy — expect a low framerate; if the screen stays black, click it once and wait.