Source portPlays instantly

Counter-Strike: Source

Valve · 2004 · PC · Shooter

About

Valve's own released Source SDK 2013 player movement code, compiled to WebAssembly and run against community bunnyhop maps rather than the retail game. Over 200 maps, PB ghosts, exportable replays and online leaderboards.

Counter-Strike: Source is a team-based tactical first-person shooter and a remake of the original Counter-Strike built on Valve's Source engine. A team of Counter-Terrorists faces a team of Terrorists across a series of rounds, each won by completing an objective such as defusing a bomb or rescuing hostages, or by eliminating the opposing team. Eliminated players do not respawn until the next round, and moving while firing reduces accuracy, encouraging careful positioning. The Source engine added interactive physics objects, ragdoll effects, and higher-detail environments, and the game was later succeeded by Counter-Strike: Global Offensive.

Description from IGDB.

How it runs

Project: Source SDK 2013Source port. The studio released the code; this port carries it to the browser.By Valve
Port: bunnyhop.lolBy bunnyhop.lol · WebAssemblyOnline since Oct 5, 2026
Plays with: Keyboard, mouse and touch. Saves in your browser. Online multiplayer.
You need: Nothing to bring: the port loads everything it needs.
Original: Valve, 2004, PC

Other ways to play

surfd.net
By david · Announced Oct 4, 2026
Play
ReimplementationPlays instantly
An independently written physics engine that loads real community-made Source surf map geometry and checks its movement against recorded play, rather than running Valve's code. No install.