Take out 100 enemies.
Take out 20 enemies.
Complete the single player campaign on Hard mode.
Complete the single player campaign on Normal mode.
Complete the co-op campaign.
Defeat Cesar.
Defeat El Raton
Defeat Cassandra.
Defeat the Priest.
Defeat the Butcher.
Perform 100 chainsaw kills.
Take out 1000 enemies.
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