25. Marathon (1994)
Don't remember this one? Not much of a surprise there. Marathon was way ahead of its time and only available to the small number of Macintosh users back in the Windows '95 era. Yet, the game's legacy lives on. Bungie took what they learned from its creation to develop a small indie title you might have heard of: Halo.
Marathon takes place in the year 2794, and tasks you with surviving an alien invasion of your spaceship and nearby colonies. It's not as sexy as Master Chief's Mjolnir armor, but 1994 was a particularly un-sexy year. Like, O.J. Simpson double homicide un-sexy.