Beat Ironworks Facility.
Maul 200 enemies to death with a sawspider.
Beat Jungle Outpost.
Beat Old Military Base.
Kill 10 enemies with a single railgun bullet.
Unlock new difficulty mode.
Make 200 enemies die horribly by burning alive.
Find 30 skulls.
Find 10 skulls.
Find 20 skulls.
Find all skulls.
Complete the game in 1.5 hour on at least HARD difficulty.
Impale 25 enemies on hook by kicking them.
Complete the game in 1 hour on at least HARD difficulty.
Die 200 times in total.
Beat The Last City.
Repeat a single level 10 times.
Beat Volcano Research Station.
Kill 1000 enemies.
Complete the game in 45 minutes on at least HARD difficulty.
Complete the game on "Hard" difficulty.
Complete the game on "Harder" difficulty.
Complete the game on "The Hardest" difficulty.
Complete the game on "Impossible" difficulty.
Impale 50 enemies on hook by kicking them.
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