Half-Life: Opposing Force Walkthrough Missing in Action

September 12, 2016 (Last Updated: ) | Reading Time: 5 minutes

This Half-Life: Opposing Force walkthrough is divided into 12 total pages.

You can jump to nearby pages of the game using the links above.

Missing in Action

Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 85
Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 85

Go towards the end of the narrow path.

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Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 86

Crouch under here to get in.

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Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 87

Get through the vents but beware that some of the tiles can break and you will drop down a place with electrified water.

Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 88
Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 88

If you drop down here you will have to get back up to the vents again.

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Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 89

At the end of the small vents you will reach two big fans. Walk over the small paths to reach the other side.

Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 90
Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 90

Jump to the other fan from here.

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Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 91

You might have to take some damage when you pass through the steam.

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Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 92

Go down here.

Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 93
Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 93

Jump down the hole that is under the broken fan. You will have to do it fast because even with one propeller the fan is still deadly.

Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 94
Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 94

Cross this section when you wait for the flames to pass.

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Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 95

Enter a vent.

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Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 96

Another set of flames to cross.

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Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 97

Proceed through the pipe.

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Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 98

Go towards the box with red sign.

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Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 99

Push the box with the danger sign forward.

Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 100
Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 100

You need to push the explosives box in the place beyound the striped line.

Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 101
Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 101

Press the test fire button that is near you to set off a chain explosion.

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Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 102

Go down the hole that was created by the explosion.

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Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 103

Fight off some aliens as you go down the cave.

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Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 104

Follow the pipes that go down.

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Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 105

Enter the vent.

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Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 106

Get down on the road.

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Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 107

The dying soldier will give you some info.

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Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 108

Go to your left from here.

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Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 109

Go past the crates and prepare to fight a new type of alien.

Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 110
Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 110

This alien is fast and will rush you down but you can avoid it by going back as it tries to attack. It can shoot spikes as a ranged attack as well.

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Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 111

Go up the stairs to the service elevator.

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Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 112

Look outside the elevator shaft.

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Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 113

Jump to the ladder.

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Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 114

Go down the elevator shaft and enter the elevator.

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Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 115

You can climb up the elevator vent here.

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Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 116

Jump from the elevator to the fallen door here.

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Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 117

Go through here and try to avoid the cable at the center.

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Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 118

Jump up the crates here.

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Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 119

Go to your right and enter the place with grates.

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Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 120

Cut the power from this switch.

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Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 121

Get back to the elevator shaft and jump on the cable to climb up.

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Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 122

Jump on top of the elevator. Try to swing from the rope so the jump is easier.

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Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 123

Go down the corridor.

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Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 124

Push the small box under the vent to get inside it.

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Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 125

Exit through the destroyed wall.

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Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 126

Get back to the corridor where you left the small box.

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Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 127

Push the box near the barricaded corridor to jump to the other side.

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Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 128

Pick up a grenade from here.

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Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 129

Use the grenade to throw it at the explosive box.

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Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 130

The explosion will create a big hole in the wall.

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Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 131

Push the small box yet again. This time through the hole you just created.

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Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 132

Push the box under the next vent and enter.

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Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 133

Go through the office.

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Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 134

Jump down here.

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Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 135

Pull the lever.

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Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 136

Use the nearby radio.

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Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 137

A few soldiers will crash through the maintenance access.

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Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 138

Get the engineer soldier to follow you to the door that is nearby. He will open it with his blow-torch.

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Half-Life: Opposing Force Walkthrough - Half Life-Opposing-Force 139

You can order both soldiers to follow you in the elevator. You can use the extra firepower.

More Half-Life: Opposing Force Walkthroughs

This Half-Life: Opposing Force walkthrough is divided into 12 total pages.

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