This famous browser-based FPS Multiplayer (Counter Strike style) is back in a 4th installment with a better game engine and 3D graphics.
Registration is optional and you can directly play against players from all around the world by just choosing a server and an available room.
You can also create your own one by selecting the map, mode and number of players (between 2 and 24).
A shooting game not to be missed for fans of the genre.
Left click: Shoot
Right click: Aim
123: Switch weapons