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Part 54
Half-Life

Part 54

Defeat Gonarch in Half-Life Part 54. Learn strategies for the boss fight, including weapon choices and avoiding acid attacks.

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Defeat Gonarch in Half-Life Part 54. Learn strategies for the boss fight, including weapon choices and avoiding acid attacks.

Walkthrough
  1. 1
    Locate the cluster of three spiky plants next to a large rock wall near the area's border.
  2. 2
    Hide behind the rock wall from Gonarch and use the ledge behind it to reach a healing pool.
  3. 3
    Damage Gonarch by firing hornets through the gap between the rock wall and the plant cluster, aiming slightly below its vulnerable sac.
  4. 4
    If Gonarch fires acid, quickly run along the ledge behind the rock to avoid it.
  5. 5
    After Gonarch is damaged enough, it will crash through vines blocking a cave tunnel entrance.
  6. 6
    Ensure all baby headcrabs are killed, then enter the cave tunnel.
  7. 7
    Find an armor battery and ammo canister near a dead HEV (Hazardous Environment suit) guy (a non-player character wearing protective gear). Save your game here.
  8. 8
    As section c4a2a loads, run forward to avoid a rockfall.
  9. 9
    Use the gluon gun to blast Gonarch's sac with a continuous stream of fire, resuming fire when your aim is sure.
  10. 10
    When Gonarch spits acid, run forward to avoid it.
  11. 11
    If gluon ammo is insufficient, switch to the RPG or assault rifle to damage Gonarch's sac.
  12. 12
    If hit by acid or spiky legs, quickrestore (reload a previous save) and try again.
  13. 13
    Alternatively, use fully powered altfire (alternate fire mode) blasts from the gauss gun, with three blasts being sufficient.
  14. 14
    Stay back near the cave-in, charge an altfire blast, and hit Gonarch when it appears.
  15. 15
    Move into the rubble corner if knocked back and charge another altfire blast.
  16. 16
    Blast Gonarch again when it appears, then switch to the hornet gun to shoot down any baby headcrabs.
  17. 17
    Switch back to the gauss gun and charge a third altfire blast.
  18. 18
    Finish off any remaining baby headcrabs and ensure Gonarch has moved to the next area.
  19. 19
    Before following Gonarch, find the large trapezoid-shaped hole in the ground in the back corner.
  20. 20
    Drop into the hole and walk to a small stick-out rock.
  21. 21
    Turn around and crouch-walk backward onto the rock, ready to shoot an appearing headcrab with hornets.
  22. 22
    Stand up, turn around, and jump to the stick-out rock on the left to avoid more headcrabs.
  23. 23
    Enter the small room past the rock for a healing pool; refill your health to 100.
  24. 24
    Return to the stick-out rock and jump to the remaining unexplored rock.
  25. 25
    Quickly kill the headcrab in the next room with hornets.
  26. 26
    Collect the ammo canister and armor batteries.

Tips:

  • To damage Gonarch's sac, aim slightly below it so the hornets swerve up and hit the target.
  • The acid attack can be avoided by standing so you can only halfway see Gonarch, though this is difficult as it moves frequently.
  • For non-Source versions of Half-Life, avoid the strategy of firing up at Gonarch from below using the hornet gun from the healing pool, as it may cause Gonarch to become invincible. Keep a backup save if you attempt this.
  • It is useful to have a full load of gluon ammo for the first part of the

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