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Secret Achievements (Show)
Proficient Railgun User
Kill 10 enemies with a single railgun bullet.
Pump Up the Difficulty
Unlock new difficulty mode.
Find 10 skulls.
Find 20 skulls.
Find 30 skulls.
Find all skulls.
Ironworks Facility Completed
Beat Ironworks Facility.
Old Military Base Completed
Beat Old Military Base.
Jungle Outpost Completed
Beat Jungle Outpost.
Volcano Research Station Completed
Beat Volcano Research Station.
The Last City Completed
Beat The Last City.
Complete the game on "Hard" difficulty.
F#@$ You Harder
Complete the game on "Harder" difficulty.
F#@$ You the Hardest
Complete the game on "The Hardest" difficulty.
F#@$ You Ultimately
Complete the game on "Impossible" difficulty.
Complete the game in 1 hour on at least HARD difficulty.
Do it alone with your own hand.
Repeat a single level 10 times.
Kill 1000 enemies.
Die 200 times in total.
Impale 25 enemies on hook by kicking them.
Impale 50 enemies on hook by kicking them.
Maul 200 enemies to death with a sawspider.
Make 200 enemies die horribly by burning alive.
Complete the game in 45 minutes on at least HARD difficulty.
Complete the game in 1.5 hour on at least HARD difficulty.
Upload your level pack to the Workshop.