Marathon: the expert scenario. Will break your knees and gloat about it, but will also lure you in with a very unique, puzzle of a storyline and some really memorable shootouts.

Expect:
- changing allegiances
- challenging combat and difficult maps
- esoteric story twists
- exploring every corner of a map to meet your objective
- a really tough gauntlet of vacuum maps

Marathon: the expert scenario. Will break your knees and gloat about it, but will also lure you in with a very unique, puzzle of a storyline and some really memorable shootouts. Expect: - changing allegiances - challenging combat and difficult maps - esoteric story twists - exploring every corner of a map to meet your objective - a really tough gauntlet of vacuum maps