Kill 300 soldiers in story mode.
Get spotted by security cameras at least 10 times in story mode.
Kill 50 soldiers using combo attack in story mode.
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Kill 50 soldiers using stealth in story mode.
Finish the game on any difficulty.
Finish the game on Veteran difficulty.
Find and collect 36 bonus Ulyssium.
Finish all three chapters with combat rank S in story mode.
Unlock all combos.
