Caleb from Blood (1997). Too stubborn to quit, too stupid to die. This guy wakes up in a grave with a pitchfork in his hand and kills anyone who crosses his path. Strange fellow.
Duke Nukem...Your average alcoholic, weapon toting, steroid consuming macho of the 90s. The main protagonist of the best fps game of 1996 (duke 3D) and the worst fps game of 2011 (duke forever) He also was a 2D platformer hero before 96 but no one would care to that stuff nowadays. And there was something called the Manhattan project around 2002 or 2003 but whatever...
Doomguy from Doom, the 90's game that is considered one of the most significant and influential titles in the video game industry. Due to his bikini like armour exposing his abs, he was dubbed the berserk belly dancer of the marine corps . I actually like the dorky dress, reminds me of he-man toys from the 80s
Gordon Freeman... 1998's employee of the year from Half-Life. Making science with a crowbar. Also check out this old post for other half-life characters