soccer game played with tanks or helicopters

battleball

soccer game played with tanks or helicopters

3D platform shooting game

blobandconquer

3D platform shooting game

Blob Wars episode II: Blob and Conquer is the sequel to Blob Wars: Metal Blob Solid.
fast 2D tank arcade game with multiplayer and split-screen modes

btanks

fast 2D tank arcade game with multiplayer and split-screen modes

Battle Tanks is a funny battle on your desk, where you can choose one of three vehicles and eliminate your enemy using the whole arsenal of weapons. It has original cartoon-like graphics and cool music, is fun and dynamic and has death-match and cooperative network modes.
football (a.k.a soccer) management game

bygfoot

football (a.k.a soccer) management game

Bygfoot allows you to manage a team by training the players, buying and selling them, contracting loans, maintaining the stadium, etc. You can be promoted or relegated, even become a champion if you're a skillful manager. You can customise Bygfoot by writing your own country definition files or by creating your own team definition files.
the classic corewars game with a gtk-look

corewars

the classic corewars game with a gtk-look

screen from walktest application

crystalspace

Multiplatform 3D Game Development Kit (binaries)