Find the 19 audio recordings at Arbeit 1.
Complete the game on Normal difficulty or higher.
Complete the game on Hard difficulty.
Relive the past.
Fight to the extraction point in Nova Prospekt.
Lead the invasion of Arbeit Communications.
Escape the chamber catacomb beneath Arbeit 1.
Drive to Arbeit 2.
Capture Judith Mossman.
Stop your predecessor.
Bring Wilson to the upload station at the end of the game.
He's in the system.
Kill the Advisor.
Wipe the slate.
Decide against pulling the trigger.
Kill both of the gonomes in the Xentarium.
Kill 25 alien creatures with the crossbow.
Kill the gigantic man-eating monster.
Flip your APC.
Consume 10,000 kg with Xen grenades.
Witness the secret temporal overlay in the monitoring station.
Neutralize Dr. Mossman's helicopter on the Arbeit 3 helipad.
Find and kill all 4 instances of the Temporal Crab.
Reach the extraction point with four soldiers.
Reach the secret lab within Arbeit 1 with five soldiers.
Enter the domain of the Project on your way to Arbeit 2.
Meet the Miscreant Agent.
Kill 18 rebels using the 357.
Kick open 60 doors.
Kick the Advisor.
Kill a long-jump rebel whilst they are in mid-air.
And there it is.
Reunite with Scar Zero at Entropic Control.
Find and open all of the Wilson closets.
Get health from a surrendered medic.
Earn bronze medals on all challenge maps.
Earn silver medals on all challenge maps.
Earn gold medals on all challenge maps.