Xan Kriegor

Xan is a Cybernetic being who has won multiple Liandri Tournaments. Xan led the LBX-7683 Robot Uprising in which several robots turned against the humans on the asteroid, prompting Liandri to send in a tactical squad to quell the rebellion. Xan was captured and resisted several memory wipes but was eventually reprogrammed.

Afterwards, Liandri began using Xan as the leader of The Corrupt, their team in the Tournament they sponsored. Xan won at least two Tournaments during this time. Many people believed at this time that Xan was in fact power armor worn by Jerl Liandri, the founder of the Liandri Corporation, presumably due to the lack of general knowledge of the LBX-7683 incident.

Xan was beaten by Malcolm. Liandri recalled Xan and apparently re-entered him as Xan Mark II, which apparently had little success. Xan was again recalled.

Xan's next appearance, as Xan Mark 3, came nearly a decade later. He was one of the possible opponents in the final round of the UT2004 ladder.

Epic indicated early on that Xan and his team would return in UT3, but as of yet he nor any other robots have been seen.

Xan in the Tournament
Source: Epic's Timeline

Wins

 * Multiple years before 2291, in illegitimate tournaments.
 * 2291
 * 2292

Finals

 * 2293 (Unreal Tournament)
 * 2303 (UT2004) - A possible final boss. The others are Malcolm and ClanLord.

Things owned by Xan
Xan is described as owning several arenas in Unreal Tournament. These are:
 * AS-Rook
 * DM-Hyperblast - which serves as the final level of UT (as does its remake in UT2004)
 * DM-Tempest