Here is the full list of all 22 UBERMOSH:WRAITH achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
SCORE 800, KENSAI CLASS MOD
SCORE 1000, KENSAI CLASS MOD
SCORE 800, WARLOCK CLASS MOD
SCORE 1000, WARLOCK CLASS MOD
SCORE 800, CATALYST CLASS MOD
SCORE 1000, CATALYST CLASS MOD
SCORE 800, NO CLASS MODS
SCORE 1000, NO CLASS MODS
SCORE 800, GUNNER CLASS MOD
SCORE 1000, GUNNER CLASS MOD
SCORE 1200
SCORE 1000, WRAITH CLASS MOD
SURVIVE AN EVENT, WRAITH CLASS MOD
SCORE 800, WRAITH CLASS MOD
SURVIVE AN EVENT, PSYKER CLASS MOD
SCORE 800, PSYKER CLASS MOD
SCORE 1000, PSYKER CLASS MOD
SURVIVE AN EVENT, CATALYST CLASS MOD
SURVIVE AN EVENT, WARLOCK CLASS MOD
SURVIVE AN EVENT, GUNNER CLASS MOD
SURVIVE AN EVENT, KENSAI CLASS MOD
SURVIVE AN EVENT, NO CLASS MODS