All these shaders are multiplayer compatible and you wont get VAC ban.
You can use these shaders only on the latest Half-Life version due to some console commands.
- Download any shaders you want
- Replace shader files in
Half-Life/platform/gl_shaders/
folder. - Run Half-Life
- Load any map
- Type
sv_allow_shaders 1
andgl_reloadshaders
in console - Disconnect from map
- Have fun