ok, so not the real counter-stirke, but a flidgin' awsome clone!
basically it's counter-strike, and i mean counter-strike, menu, sounds maps, interface, and all, in a 2d environment, third person top down shooter. Very fun, and worth a try. Comes with AI bots, or you can connect to servers, and play on a network.
Can't get over how fun this game is.
The links on the homepage don't work =S so here's where you can download it. just click the Lataa tästä link