1. Bone Breaker
Kill 30 enemies with thrown physics objects..
5 points

2. Deadly Harvest
Kill an enemy by planting a hopper mine..
5 points

3. Hack Attack!
Kill five enemies with a Manhack..
5 points

4. Hot PotatOwned
Kill a Combine soldier with his own grenade..
10 points

5. Conservationist
Kill five enemies with the same energy ball..
5 points

6. Think Fast!
Kill an Elite Soldier with his own energy ball..
10 points

7. Grave Robber
Steal a Zombine's grenade..
5 points

8. Zombie-que
Use flares to light 15 zombies on fire..
5 points

9. Malcontent
Escape the apartment block raid..
5 points

10. What cat?
Break the mini-teleporter in Kleiner's lab..
5 points

11. Trusty Hardware
Get the crowbar..
5 points

12. Barnacle Bowling
Kill five barnacles with one barrel..
5 points

13. Anchor's Aweigh!
Get the airboat..
5 points

14. Heavy Weapons
Get the airboat's mounted gun..
5 points

15. Vorticough
Discover the hidden singing vortigaunt cave in chapter Water Hazard..
13 points

16. Revenge!
Destroy the hunter-chopper in Half-Life 2..
10 points

17. Blast from the Past
Find the HEV Suit Charger faceplate in Eli's scrapyard..
10 points

18. Zero-Point Energy
Get the Gravity Gun in Black Mesa East..
5 points

19. Two Points
Use DOG's ball to make a basket in Eli's scrapyard..
2 points

20. Zombie Chopper
Play through Ravenholm using only the Gravity Gun..
25 points

21. OSHA Violation
Kill 3 enemies using the crane..
5 points

22. Targetted Advertising
Pin a soldier to the billboard in chapter Highway 17..
5 points

23. One Man Army
Destroy six gunships in Half-Life 2..
5 points

24. Keep Off the Sand!
Cross the antlion beach in chapter Sandtraps without touching the sand..
20 points

25. Bug Hunt
Use the antlions to kill 50 enemies..
10 points

26. Flushed
Kill an enemy with a toilet..
5 points

27. Warden Freeman
Survive the second turret standoff in Nova Prospekt..
10 points

28. "Radiation Levels Detected"
Get through the toxic tunnel under City 17 in Half-Life 2..
5 points

29. Plaza Defender
Survive the generator plaza standoff in chapter Anticitizen One..
10 points

30. Counter-Sniper
Kill all of the snipers in City 17..
5 points

31. Fight the Power
Shut down the supression device by disabling its generators..
10 points

32. Giant Killer
Survive the rooftop strider battle in the ruins of City 17..
10 points

33. Lambda Locator
Find all lambda caches in Half-Life 2..
15 points

34. Watch Your Head!
Make it to the bottom of the Citadel's main elevator shaft in one piece..
5 points

35. Containment
Contain the Citadel core..
5 points

36. Pacifist
Contain the Citadel core without killing any stalkers..
10 points

37. Car Crusher
Use the cars to squash 15 antlions in Episode One..
5 points

38. Elevator Action
Survive long enough to get on the parking garage elevator..
10 points

39. Live Bait
Help Alyx snipe 30 enemies in Episode One..
10 points

40. Attica!
Destroy the gunship in the hospital attic..
5 points

41. Citizen Escort
Don't let any citizens die when escorting them to the escape train..
15 points

42. Escape From City 17
Escape City 17 with Alyx..
20 points

43. The One Free Bullet
Beat Episode One firing exactly one bullet. Grenade, crowbar, rocket, and Gravgun kills are okay!.
40 points

44. Acid Reflex
Kill an acid antlion worker..
5 points

45. Get Some Grub
Squish every antlion grub in Episode Two..
20 points

46. Pinata Party
Find and break every web cache in Episode Two..
5 points

47. Into the Breach
Help Griggs and Sheckley hold off the antlion invasion inside the mine shaft..
5 points

48. Hit and Run
Run over 20 enemies with the car in Episode Two..
5 points

49. Puttin' On a Clinic
Defeat the chopper in Episode Two without any misses..
15 points

50. Cache Checker
Find every radar cache in chapter Under The Radar..
10 points

51. Gordon Propelled Rocket
Unlock the rocket launcher lambda cache in chapter Under The Radar..
5 points

52. Pedal to the Metal
Beat DOG in a race to the White Forest base..
5 points

53. Little Rocket Man
Send the garden gnome into space..
30 points

54. Neighborhood Watch
Save all buildings outside the missile silo from destruction..
35 points

55. Payback
Kill a Hunter with its own flechettes..
10 points

56. Lab Rat
Acquire the fully powered Aperture Science Handheld Portal Device..
5 points

57. Fratricide
Do whatever it takes to survive..
5 points

58. Partygoer
Make the correct party escort submission position decision..
5 points

59. Heartbreaker
Complete Portal..
10 points

60. Terminal Velocity
Fall 30,000 feet..
5 points

61. Long Jump
Jump 300 feet..
5 points

62. Cupcake
Beat two Portal advanced maps..
10 points

63. Fruitcake
Beat four Portal advanced maps..
20 points

64. Vanilla Crazy Cake
Beat all six Portal advanced maps..
30 points

65. Basic Science
Earn bronze medals on all Portal challenges..
10 points

66. Rocket Science
Earn silver medals on all Portal challenges..
20 points

67. Aperture Science
Earn gold medals on all Portal challenges..
40 points

68. Turret
Accumulate 10 turret kills with a single turret..
5 points

69. Nemesis
Get five revenge kills..
5 points

70. Hard to Kill
Get five kills in a row without dying..
10 points

71. Master of Disguise
Trick an opposing medic into healing you..
15 points

72. With Friends Like these...
Play in a game with seven or more players from your friends list..
10 points

73. Dynasty
Win 20 games..
10 points

74. Hardcore
Accumulate 1000 total kills..
15 points

75. Powerhouse Offense
Win 2Fort with a shutout..
5 points

76. Lightning Offense
Win Well in 5 minutes or less..
10 points

77. Relentless Offense
Win Hydro without giving up a capture..
20 points

78. Impenetrable Defense
Successfully defend Dustbowl without giving up a capture..
10 points

79. Impossible Defense
Successfully defend Gravel Pit without giving up a capture..
30 points

80. Head of the Class
Play a complete round with every class..
5 points

81. World Traveler
Play a complete game on every map..
5 points

82. Team Doctor
Accumulate 25000 heal points as a Medic..
5 points

83. Flamethrower
Set five enemies on fire in 30 seconds..
5 points

84. Atomizer
Disintegrate 15 soldiers by throwing them into a Combine ball field..
10 points

85. Follow Freeman
Gain command of a squad of rebels in the uprising..
10 points

86. Grey Matter
Get 25 headshots as a Sniper..
5 points

87. Camera Shy
Detach security cameras from the walls..
5 points

88. Friendly Fire
Knock down a turret with another turret..
5 points

89. Defiant
Hit the trashcan cop with the can.
5 points


90. Submissive
Put the can in the trash.
5 points


91. Where Cubbage Fears to Tread
Defend Little Odessa from the gunship attack.
5 points


92. Hallowed Ground
Escort Gregori safely through the church cemetery.
5 points


93. Singularity Collapse
Destroy the Citadel's reactor core.
25 points


94. Twofer
Defeat both antlion guards outside the White Forest.
5 points


95. Meet the Hunters
Survive the Hunter ambush with Alyx.
10 points


96. Gunishment!
Destroy the Combine cannon in the junkyard.
5 points


97. Quiet Mountain Getaway
Survive the ambush at White Forest Inn.
10 points


98. Secondary Silo Secured
Secure the launch doors on missile silo 2.
5 points


99. Defense of the Armament
Save the missile silo from the Combine offensive.
20 points

