Armagetron Advanced is an open-source multiplayer video game "that attempts to emulate and expand on the Light Cycle sequence from the movie TRON".  The game is available for Microsoft Windows, Mac OS X, Linux and OpenBSD operating systems and is released under a GNU General Public License, making the game freeware.
The vehicles constantly move forward, although there is a way to change one's velocity: the closer a player is to a wall, the faster their cycle will move. Players can change the direction of movement, by turning 90 degrees to the left or right.
Several game modes exist:
- Team Gauntlet: Two teams compete with each other on various generated maps.
- Death Match: Last man standing.
- Team Death Match: Cooperate with teammates.
- Fortress: Capture the enemy base. This game can be played with teams or death match style.
- Sumo: The object is to stay in a zone while trying to force the opponent out.
- Race: Race to the win zone at the end of the map.
- Maze: Find a path to the win zone.
- Sty Patch (formerly Pig Sty):
- Shooting: A team death match where the object is to try to shoot the other team's players with death zones.
- StyBall: A team match where the object is to score a goal by pushing the ball zone into the goal zone. (quite similar to football)
- Capture the Flag: Capture the opponents' flag And players respawn once they have died.
- Capture The Flag Shooting: Capture the opponents' flag while shooting and player respawn once they have died.
- 2000: Walls, a prototype for Armagetron is released for Linux and Windows.
- 2001-2003: Armagetron is released and actively developed.
- 2003: A Mac OS X port created by Ben Hines is released.
- 2003: The author, Z-man, halts development and breaks communication channels. The Master Server Browser, used to connect to internet games, continues to run.
- 2004: A group of developers fork Armagetron and create Armagetron Advanced.
- 2007: Included in Fedora Core under the name Armacycles Advanced.
- Present Day: Development continues.