Half-Life: Opposing Force

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Singleplayer Maps
Tutorial / Boot Camp:
 * ofbooto
 * ofboot1
 * ofboot2
 * ofboot2
 * ofboot3
 * ofboot4

Chapter 1: Welcome to Black Mesa
 * of1a1
 * of1a2
 * of1a3
 * of1a4
 * of1a4b

Chapter 2: "We Are Pulling Out"
 * of1a5
 * of1a5b
 * of1a6

Chapter 3: Missing In Action
 * of2a1
 * of2a1b
 * of2a2
 * of2a3

Chapter 4: Friendly Fire
 * of2a4
 * of2a5
 * of2a6

Chapter 5: "We Are Not Alone"
 * of3a1
 * of3a1b
 * of3a2

Chapter 6: Crush Depth
 * of3a4
 * of3a5
 * of3a6

Chapter 7: Vicarious Reality
 * of4a1
 * of4a2
 * of4a3

Chapter 8: Pit Worm's Nest
 * of4a4
 * of4a5

Chapter 9: Foxtrot Uniform
 * of5a1
 * of5a2
 * of5a3
 * of5a4

Chapter 10: The Package
 * of6a1
 * of6a2
 * of6a3
 * of6a4

Chapter 11: Worlds Collide Chapter 12: Conclusion
 * of6a4b
 * of6a5
 * of7a0

Multiplayer Maps
Deathmatch / Team Deathmatch:

Control Point: Capture The Flag:
 * op4_bootcamp
 * op4_datacore
 * op4_demise
 * op4_disposal
 * op4_gasworks
 * op4_kbase
 * op4_kndyone
 * op4_meanie
 * op4_outpost
 * op4_park
 * op4_repent
 * op4_rubble
 * op4_xendance
 * op4cp_park
 * op4ctf_biodomes
 * op4ctf_chasm
 * op4ctf_crash
 * op4ctf_dam
 * op4ctf_gunyard
 * op4ctf_hairball
 * op4ctf_mortar
 * op4ctf_power
 * op4ctf_repent
 * op4ctf_wonderland
 * op4ctf_xendance