Someone of the german forum wrote a game called "Defend2D". It's a 2D shooter CS and ET like. It's easy to play. You are a green soldier and fight again other green soldiers (a little strange, I know o_O). You have most weapons available in other games too.
The menu of this game is in german. Here some german words translated to english:
einzelspieler - singleplayer
mehrspieler - multiplayer (not works yet)
optionen - settings (not works too)
beenden - quit game (works
)Keyshortcuts:
w you can walk forward
a walk into left
s walk backward
d walk into right
left mouse button : you shot with the current weapon (yeah
) wheelrad : you can switch beyond the weapons
here you can download it:
http://www.leoware.de/down/Defend2D.rar (you can always find the newst version)