Sustained a 6x multiplier for 60 seconds.
Assassinate 50 enemies while invisible.
Fully upgrade any skill.
KO'ed 100 enemies by throwing them against the panel edges.
Defeated the final boss.
KO'ed 50 enemies with thrown objects.
Earned 75K points in Survival mode.
Unlocked Rick's entire skill tree.
Unlocked Lori's entire skill tree.
Completed a full issue without taking any damage.
Completed 5 Story issues in Co-op mode.
Completed a Story issue in Co-op mode.