BZFlag

BZFlag is a free and open-source multiplayer 3D tank game. The game is played online against other players from around the world. The aim of the game is to destroy all enemy tanks.

The game offers various game modes such as deathmatch, team deathmatch, capture the flag and more. In each game mode there are different goals and objectives.

BZFlag is a very fun and thrilling game that is suitable for players of all ages. The game is also very realistic and offers realistic graphics and physics.