Open surfd.net on a desktop with keyboard and mouse and surf a classic map. The physics is a rebuild of Source movement at 66 tick, not a decompiled game, and ranked runs are verified by the server. Free, no download.
From the creator
counter-strike surf in your browser just got multiplayer.
— david (@0yield) October 7, 2026
the movement & physics feel SO close to the original that i keep forgetting i'm in a browser.
come surf the web. 🏄♂️
The original game
Counter-Strike: Source is the 2004 remake of Counter-Strike on Valve's Source engine. Terrorists and counter-terrorists play rounds and win by completing an objective, such as defusing a bomb or rescuing hostages, or by eliminating the other team. It holds 88/100 on Metacritic. Its movement is what the bunnyhop and surf sites rebuild.
Built on Valve's Source engine as a remake of the 2000 Counter-Strike. Counter-Strike: Source on Wikipedia
The browser version
Surfd is "made by @0yield". It offers classic Source-style surfing at 66 tick with normal and auto bunnyhop movement, a practice mode with save and load position, replays and diagnostics (including a downloadable command replay), route watching and a checkpoint comparison against your personal best and the top verified run. The home page says there are 15 classic courses and features surf_boreas, a linear two-checkpoint course by Syncronyze.
It is not a decompiled game. Its reference page documents a reimplementation: a 66.67 Hz tick, Source SDK 2013 as evidence for the movement, input, mouse and field-of-view rules, and a target of Counter-Strike: Source "KSF forward style". Mouse look uses 0.022 degrees per count with raw input and no smoothing. Replays are re-simulated on the server before they count.
Ranked runs use auto bunnyhop with a capped start speed of 325 units per second on the ground and 350 in the air. Runs with unrestricted starts keep only local bests. Community servers have a server browser, non-colliding players and a 30-minute map duration. On October 7, 2026 the creator posted that Surfd "just got multiplayer"; the post is embedded above.
The reference page credits its sources: Valve's Source SDK 2013, RNGFix by jason-e, the Momentum mod, MomSurfFix by GAMMACASE and the KSF community, with map credits including Syncronyze, Panzer, Arblarg, elly, SnoopSh, SSStormy, TeMP, iNooVa, Kiiru, ArchAngel, Juxtapo, SintaxError and Paper-Cut. The character model is adapted from a CC0 pack by Wobble Blocks.
| Method | Movement reimplementation, not a decompilation |
|---|---|
| Tick rate | 66.67 Hz (0.015 s) |
| Reference | Counter-Strike: Source, KSF forward style, 66 tick |
| Ranked rule | Auto bunnyhop, start speed capped at 325 (ground) and 350 (air) |
| Verification | The server re-simulates replays |
| Needs | Desktop browser, keyboard and mouse |
How to play it
- Open surfd.net on a desktop with keyboard and mouse.
- Pick a map and use WASD, jump and duck. On a ramp, release W and hold the strafe key toward its face.
- Try practice mode to save positions, or pick a community server from the server browser.
Links
Source code
Questions
Can you play CS surf in a browser?
Yes. surfd.net runs Counter-Strike: Source style surf in a desktop browser, free and with no download.
Is Surfd decompiled or recompiled?
Neither. It rebuilds Source movement from public Source SDK 2013 rules and published constants. People search it as "CS surf recompiled" for the same thing.
Does it have multiplayer?
Yes: community servers with a server browser, non-colliding players and 30-minute maps.
Are leaderboard runs verified?
Yes. Replays are re-simulated on the server, and ranked runs use auto bunnyhop with a capped start speed.
Does it work on a phone?
No. It is desktop only, with keyboard and mouse.
Sources and coverage
Details checked 2026-10-08. Fan projects change fast; check the project page for the latest.