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Part 29
Half-Life: Opposing Force

Part 29

Navigate underwater passages and find the crossbow in Half-Life: Opposing Force Part 29. Learn how to defeat enemies and find ammo.

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Navigate underwater passages and find the crossbow in Half-Life: Opposing Force Part 29. Learn how to defeat enemies and find ammo.

Walkthrough
  1. 1
    Leave the underwater passages by going straight and then turning right.
  2. 2
    Enter a room where an ichthyosaur is eating a scientist. You can kill it with the assault rifle and/or shotgun, but it is time-consuming and ammo-intensive.
  3. 3
    Carefully move around the room, avoiding slick spots and barnacle tongues.
  4. 4
    At the end of the walkway, find a side area with a ladder leading up to a room with a scientist, first aid station, and HEV station.
  5. 5
    Continue past the stations and along a metal beam to a point where you can drop into a hanging cage.
  6. 6
    Quick-save before dropping into the cage to grab the crossbow weapon.
  7. 7
    Maneuver within the cage until it falls into the water.
  8. 8
    Swim up through the gap at the top and turn left.
  9. 9
    Swim towards the underwater doorway as fast as possible to avoid the ichthyosaur. If bitten once, continue to the scientist's room for healing. If bitten multiple times, quick-restore and try again.
  10. 10
    Alternatively, to get the crossbow: drop onto the top edge of the cage, crouch-walk slowly forward to pick up the crossbow as you fall into the water. The underwater doorway will be ahead and to the left.
  11. 11
    Return to the walkway and go back to the entrance of the side area with the ladder. Use the wall stations if needed.
  12. 12
    Locate a door next to a broken-off walkway at the back of the ichthyosaur tank.
  13. 13
    Get out the crowbar and run-hop along the water to a barnacle whose tongue hangs near the end of the broken-off walkway.
  14. 14
    When caught by the barnacle, look up and whack it. Lean on the "Move forward" key to land on the walkway.
  15. 15
    Go through the door, then the doorway on the left, and down steps to an underwater area with crossbow clips. Collect them.
  16. 16
    Go back the way you came and down the corridor until section c2a3b loads.
  17. 17
    SRC Note: The barnacle tongue method is not viable here. Drop into the water and quickly go into the corner to the left of the broken-off walkway.
  18. 18
    Dive down, find the gate and its red wheel. Surface for air, then dive back down and use the wheel until the gate is most of the way up.
  19. 19
    Quickly go under the gate and along the passage to surface for air. Ensure you have collected all crossbow ammo near the gate.
  20. 20
    Section c2a3b: TWO-ICHTHYOSAUR TANK AND GENERATOR PISTON ROOM
  21. 21
    Go up steps and through a door into a room full of barnacles. Stay near the door and kill them with the shotgun.
  22. 22
    Shoot the top of the large crate with shotgun shells on it to cause two vortigaunts to teleport in. Quickly retreat past the door for cover (press the cover button to crouch behind walls or objects).
  23. 23
    Shoot the vortigaunt on the walkway, then sneak to the floor below and shoot the other vortigaunt.
  24. 24
    Bash crates on the floor to find shotgun ammo.
  25. 25
    Move down the hallway to a room with a broken-up walkway and two ichthyosaurs.
  26. 26
    Go to the end of the first walkway segment, turn left, and find a hole in the fencing in the back corner.
  27. 27
    Quick-save, then run-hop along the water and jump through the fence hole. If you miss or get caught by the ichthyosaurs, quick-restore.
  28. 28
    As soon as you are past the fence hole, dive down and swim quickly along the underwater passage to a ladder.
  29. 29
    Climb the ladder to a large room, then run down the side passage ahead and to the left.
  30. 30
    Climb another ladder to the upper floor. A bullsquid may have followed you; if not visible, climb back down and sneak-shoot it with the crossbow.
  31. 31
    Return to the upper floor. Crossbow-kill the second bullsquid that teleports into the lower floor.
  32. 32
    Go down the passage at the other end of the upper floor to find a side room with ammo.
  33. 33
    Follow the walkway past the side room to find another crossbow clip.
  34. 34
    Return to the upper floor of the big room. Do not use the switch on the control panel to activate the pistons.
  35. 35
    Instead, push the small metal box so it falls to the floor below. Drop down after it.
  36. 36
    Push the metal box against the large green crate in the back left corner. Jump onto the metal box, then jump-crouch onto the green crate.
Tips
  • Killing the ichthyosaur near the beginning can make getting the crossbow safer, but it uses a lot of ammo and time.
  • If the ichthyosaur bites you once while swimming to the underwater doorway, keep going as you can heal later.
  • Quick-saving before risky maneuvers, like dropping into the cage or jumping through the fence hole, is highly recommended.
  • Jump-crouching might help with navigating tight spaces or making difficult jumps.
  • The crossbow is your primary weapon until the end of the chapter.
  • Crossbow
  • Crossbow clips
  • Shotgun ammo
  • C4 satchel bombs (optional, via piston room)

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