Here is the full list of all 18 ClusterPuck 99 achievements.
You patiently waited over 300 days for this update
Rack up 1 hour of Hold Time
Rack up 500 lifetime Deaths
Rack up 1000 lifetime Checks
Obtain Shotblocker medal 25 times
Obtain Roughhouser medal 25 times
Obtain the Untouchable medal 25 times
Rack up 100 lifetime Goals
Rack up 10 lifetime Oopsies
Complete a 10 minute match on any level
Win a Minefield match without dying
Score 3 goals in one match
Defeat and Unlock 49th Street
Complete the ClusterPuck 99 Challenge Mode
Achieve a Gold Medal on the Target Practice Challenge
Achieve a Gold Medal on the Goalie Practice Challenge
Disrespect an opponent after a Slam Dunk