I was messing around with people on my server recently using amx_super plugin: amx_glow @all 0 0 0 0. That makes everyone invisible. I was surprised that people really liked this kind of game and actually asked me few times later to do it again. The name for this mode came up spontaneously: “Marco Polo”. If sv_alltalk is on, the only way to see a person is if he says something (you can see this little thing above his head). People would say “Marco” and the opposite team players would say “Polo”. You also can see a player if you accidently run into him, when you see his name in the center of the screen.
I thought that you guys could create a plugin which uses amx_glow on everyone at the beginning of each round. Or to avoid players who just joined to be visible, the plugin should use amx_glow on each connected player. I don’t know if this mode was already invented (sorry for wasting your time if it was). I also don’t know how to create plugins yet. But since I saw plugins a lot more complicated than this one, I think someone could really create a plugin like that. It would start a new generation of CS mods in addition to gungames, deathmatches, zombiemods etc.