Replaying in coop with different player numbers since the puzzles adapt should lengthen the game somewhat but maybe that was too ambitious and they had to cut too many corners.
Well, RPS calls is a "brief game".
Welp that sucks. Hoping to get at least 10 hours out of it. :\ Oh well, might as well wait for a sale then. Still need to play through FC3 and Sniper Elite 3. >_<