What it actually is
Surfd is an independent browser implementation of Source-style surf movement, not Counter-Strike itself. It offers a set of classic community surf courses, saved personal bests and global leaderboards, and it is free with no download. It is built for desktop: you need a keyboard and mouse to strafe.
Controls
WASD to move and strafe, Space or mouse wheel to jump, Shift to duck, R to restart, Esc for the menu.
The legitimate way to play
Surfd is its own free game. Real CS surf servers run in Counter-Strike 2, which is free on Steam.
If CS Surf won't load
- Give the first load time. CS Surf downloads its engine and data before the first frame, and a cut-off download often looks like a frozen black screen. Reload once on a stable connection before trying anything else.
- Click inside the game window before pressing keys. Browser games only receive keyboard and mouse input once the page has focus, and most need a click to capture the mouse.
- If the screen stays black, run our browser check. A missing WebGL 2 result usually means an outdated browser or a graphics driver the browser has blocked.
Chromebook, phone and tablet
On a Chromebook, CS Surf should start in Chrome as long as the browser check shows WebAssembly and WebGL 2. Low-end Chromebooks may need lower graphics settings, and managed school devices can block sites or downloads entirely; follow your school's rules. It is built for keyboard and mouse, so a phone or tablet is not a realistic way to play it.
Play something similar right now
Half-LifeFree to try · WebXash
Skate 3Fan recreation · skate3-cleanroom (GitHub Pages)
DiabloFree to try · DiabloWebQuestions
How do I surf?
On a ramp, let go of W, hold the strafe key toward the ramp and move the mouse gently in the same direction.
Is it multiplayer?
It has online and solo modes plus global leaderboards.
Is this connected to Radiant Optimizer?
No. Radiant Optimizer is Windows tuning software. This title was simply included in a viral post by its X account.