ClanBomber is a free (GPL) Bomberman-like multiplayer game that uses ClanLib, a
free multi platform C++ game SDK. First "ClanBomber" was only a working title
for a small game started in September 1998, that has only been started to learn
how to use ClanLib. But the ClanBomber project has grown into a real game. It
is fully playable and features Computer controlled bombers, however, it is
recommended to play ClanBomber with friends (3-8 players are really fun). 

WWW: http://clanbomber.sourceforge.net/