Is Darth Revan Dead

No body knows, in the official time-line Revan is redeemed and in a vision shortly after the events of Kotor he saw the "true Sith" hiding in the unexplored realms of space. He then hunts down these Sith but knew the path was to dangerous for anyone but him to tread so he left his companions even his love Bastila. On his journey though Revan disappears and T3-M4 follows hidden programmes to alert the Jedi. If Revan did die I'm sure he went out with style.

--UPDATED--

Revan was imprisoned by the Sith Emperor for three centuries.

Spoiler:

This information is based of Star Wars: The Old Republic, the outcome depends on what decisions you make in the game. Either way, it is believed that he does not die. There have been some misconceptions regarding his whereabouts following his demise in the Empire Flashpoint 'The Foundry' (I haven't played it as a Republic player, so I don't know what happens in that case). Did he become one with the force? Did he use some unknown force power to flee the battle? No one knows for sure.