Here is the full list of all 7 UBERMOSH achievements. It takes around 2-3 hours to unlock all of the achievements on Windows.
CHANGE GAME MODE
SCORE 150+ NO CLASS MODS
SURVIVE 7 EVENTS
SCORE 200+ 7 TIMES
SCORE 150+ WARLOCK CLASS MOD
SCORE 150+ GUNNER CLASS MOD
SCORE 150+ KENSAI CLASS MOD