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Finish stage 1 in episode "The Deep Ones" on difficulty Easy or higher
Finish stage 5 in episode "The Deep Ones" on difficulty Easy or higher
Defeated the Shoggoth Guardian in episode "The Deep Ones" on difficulty Normal or higher
Defeat the Overseer on stage 10 in episode "The Deep Ones" on difficulty Normal or higher
Survive round 1 in the Survival Mode
Survive round 10 in the Survival Mode
Parry an attack from a Guardian
Upgrade a weapon
Kill 10 enemies with one explosive rum barrel
Kill a stunned enemy with an explosive rum barrel