wooo, marathon was good! for it's day, it was utterly stunning, so many firsts all at once. I played m1 and m2 to death, m3 was also pretty good. too bad they sold out to ms at the last minute and then things took a quick turn downhill.
We played networked deathmatch games in the lab late at night, had an absolute blast.
Well beyond the trilogy there were many 3rd-party scenarios, most notably Siege of Nor'Kohr, marathon RED, Tempus Irae, and especially marathon EVIL. All one needed was the original engine (from either m1 m2 or m∞, depending on which was required).
BTW, the iPad app looks great and is free. [only need to pay if we want invincibility.]
