Install Bullet Physics Engine in Ubuntu

$ mkdir BulletPhysicsEngine
$ cd BulletPhysicsEngine
$ svn checkout http://bullet.googlecode.com/svn/trunk/ .
$ cmake . -G "Unix Makefiles" -DBUILD_SHARED_LIBS=ON -DCMAKE_BUILD_TYPE=RelWithDebugInfo
$ make
$ sudo make install
$ cd Demos/AllBulletDemos
$ ./AppAllBulletDemos

References
http://www.warp1337.com/content/compileinstall-bullet-physics-engine-276-svn-ubuntu-910-howto

links for Games

free art for open source games
http://www.gamerenders.com/

Screen flickers when I play game

solution: disable Visual Effects (System->Preferences->Appearance->Visual Effects->None)

Linux Games

0 A.D. [http://wildfiregames.com/0ad/]

$ sudo add-apt-repository ppa:wfg/0ad
$ sudo apt-get update
$ sudo apt-get install 0ad

Urban Terror [http://www.urbanterror.info/docs/texts/110/]

Alien Arena [http://red.planetarena.org/]

$ sudo apt-get install alien-arena 

Vertigo [http://www.vertigo-game.com/]

just download,unzip and run