Complete a level without alerting anyone on hard difficulty.
Complete a level without dying on hard difficulty.
Do seven consecutive walljumps.
Kill two enemies while airbourne.
Kill an enemy with a laser trap.
Throw a camera up on the X in Trust.
Reach a horizontal speed of 14 m/s.
Kill 4 enemies within 4 seconds.
Kill an enemy from a distance of 50 meters.
Find the secret zone in Core.
Find the hidden ammo refill in Core's last zone.
Complete the game on hard difficulty.
Complete a level using only your knife on hard difficulty.
Clear a zone without killing anyone by disabling all enemy transmitters on hard difficulty.
Complete a level within two minutes on hard difficulty.