Kill a scientist.
Complete the Hazard Course.
Kill 500 headcrabs.
Welcome to Half-Life Legacy.
Complete Uplink.
Sit through the Tram Ride and complete Black Mesa Inbound.
Witness (and indirectly cause) the Black Mesa Incident and complete Anomalous Materials.
Conform to Eli's mission and complete Unforeseen Consequences.
Complete Office Complex.
Survive the HECU infiltration and complete "We've Got Hostiles."
Complete Blast Pit.
Complete Apprenhension.
Complete the labyrinth that is Residue Processing.
Witness the dirty doings of the Black Mesa Research Facility and complete Questionable Ethics.
Survive the mortars and complete "Forget About Freeman."
Disengage the first turret in Office Complex.
Kill 15 barnacles.
Destroy 5 turrets. (excludes ceiling mounted turrets)
In Office Complex, solve the chiller puzzle.
Kill 100 Alien Slaves. Don't worry, you'll come to regret this.
In Anomalous Materials, dry your hands.
In Anomalous Materials, refuse to put on the HEV Suit.
In Questionable Ethics, activate the steriliser.
In Surface Tension, destroy the first Apache.
In Surface Tension, destroy the second Apache after leaving the dam.
In Surface Tension, successfully dodge all the tripmines before descending.
In Surface Tension, destroy the third Apache on the cliffside.
In any desired order, complete the Hazard Course, Uplink, and Half-Life back to back. Doing them in one sitting is NOT required.
650
15421
1495539
275631
10250
2111
2655
405