Doom's protagonist

The Doom guy is a space marine and the protagonist in the Doom games.

Biography
The only thing known about the Doom space marine's life prior to the events of Doom is that the reason he ended up on Mars in the first place was having assaulted a superior officer for commanding fire upon civilians.

Name
According to the novels, the Doom guy's name is Flynn Taggart. This name is not widely accepted.

Statistics
* However, the Doom guy can only get through passages which are over 32 units wide.