Best No-Download Browser Shooter Games (WebGL/HTML5)

True instant-play shooters run right in your browser via WebGL or HTML5 — no installs, no launchers. Quality varies wildly, so here are the standout picks grouped by playstyle.

Casual & Arcade

• Shell Shockers (shellshock.io) — Egg-themed FPS, 60 FPS, custom servers, ranked mode.
• Krunker.io — Blocky, fast-paced movement shooter with competitive depth, mod support, and a Steam version.
• Rush Team / Rush Team 2 — Military aesthetic, class-based, fully browser-based.

Tactical & Strategy

• Bullet Force (bulletforce.com) — Call of Duty-like with classes, killstreaks, and surprisingly full features for WebGL.
• Contractors VR (WebXR) — If you own a WebXR-compatible headset, this brings mil-sim tactical play to the browser.

Classic Revivals

• Quake III Arena (WebGL ports) — quake3.js, q3web deliver authentic arena FPS action.
• Doom (WebAssembly) — dosbox.js / WASM ports let you play the 1993 original instantly.

Limitations to Expect

• No persistent accounts (progress lost on cache clear).
• Higher input latency than native apps.
• Minimal anti-cheat — cheaters are common.
• Mobile browser support is spotty.

Better Experience: Tiny Downloads

• AssaultCube — 50 MB, Cube 2 engine, runs on potatoes, active community.
• Xonotic — 1 GB, arena FPS with pro movement, free/open-source.
• OpenArena — Quake 3 clone, 200 MB, cross-platform.

Bottom line: Browser shooters = instant access. Small downloads = far better experience.