Man, Marshmallow Duel is a blast from the past… and it really was a blast, as I recall. This two-player platform deathmatch game is quick and oh so much fun. Even though it pales in comparison to heartier games like Liero and Soldat, it’s still good for a some laughs. Power-ups like “1000 Volts,” “Invisibility,” and “Mine” coupled with the great collision “physics” made this one a cult classic of DOS shareware. And now there’s an Unreal Tournament mod and a DS version? Crazy.
You may need DOSBox (worked for me on XP, though).