Arena of Blood happened in 000.
Arena Wars happened in 2004.
Arena of Octos happened in 1981.
Arena Massacre happened in 1699.
Dark Arena happened in 2002.
Laser Arena happened in 2000.
Robot Arena happened in 2001.
Legion Arena happened in 2005.
Battle Arena Toshinden happened in 1994.
Custom Robo Arena happened in 2006.
Quake III Arena happened in 1999.
Digimon Rumble Arena happened in 2001.
Wing Commander Arena happened in 2007.