Go forward a bit and an imp will jump out from behind the crates to your left. Kill him then look behind the crates and there will be a medkit and some shells. Now turn around and there will be another crate opposite you. Go look behind it and there will be a clip. Now turn left and a zombie with a pistol and a zombie with a machine gun will come around the corner. Kill them then go forward. Turn left and you will see some stairs. Go towards them and an imp will drop down from the ceiling onto the stairs. Kill him and a zombie with a pistol will come from the left. Now go left then right. A maggot will be there. Kill him and trites will start coming in.

Kill all the trites and then turn around. Go left and there will be armor next to the crate. Pick up the armor and there will be a door to your left. Once through the door pick up the PDA on the desk directly infront of you. A zombie with a machine gun will come from behind you. Infront of you there will be a control panel that will allow you to control the mechanical arm. Move the arm around until it is over a barrel and there is a red light on it. Now press the down button then the close button. Once the barrel is in the air press the ‘Transfer item to incinerator’ button.

Do this until all the barrels are gone and there is no more gas in the room. Now turn around and go through the door. Go right. 2 trites will come from your left and a maggot will come from your right. Kill them and to your immediate right will be a health dispenser. Once at full health go left then turn right. There will be some stairs, go up the stairs. Go forward a bit and to your right there will be a door. Open the door by using the control panel to the right. Once through the door there will be stairs directly infront of you. Go down the stairs. Once off the stairs infront of you there will be an orange key. Pick it up. There will be a door directly infront of you. Go through the door. Once through the door go forward. To your right there will be some stairs. Go up the stairs. On the cart to the right there will be an ammo belt and a medkit.

Now turn around and you will see a cabinet to your upper left. To the right of the cabinet there will be a PDA. Pick up the PDA and go back to the cabinet. Open the cabinet using the code 123. Inside the cabinet there will be 2 clips and some hand grenades. Now turn around and there will be a control panel. Use the control panel to raise the elevator to your upper right. On the elevator there will be 2 zombies with shotguns and a zombie with a machine gun. You can kill them easily by shooting the explosive barrel on the elevator. Once they are all dead pick up their ammo and there will be armor on the elevator. Pick it up. Now go right and go through the door.

Go forward a bit and 2 zombies with machine guns will come through the opposite door. Kill them then go through the door. Turn left and 2 zombies with pistols and one with a shotgun will be there. Kill them. Go down the stairs and take the very first left and there will be health dispenser. Once you are a full health turn and go left. Go forward a bit then go right. Then go right again. To your right there will be a door. Unlock it by using the control panel to the right.

Go through the door then left and there will be a zombie with a pistol. Kill him then go forward. A trite will come up behind you. Kill him then turn around. There will be some stairs. To the right of the stairs there will be a table. An imp will teleport in next to the table. Kill him. Once he is dead trites will swarm you again. Kill them all. Now in the upper right hand corner will be a locked cabinet. Open it using the code 123. Inside will be some bullets, a cell and a medkit. Now turn to your left and there will be some armor. Pick it up. Now turn left and go towards the stairs.

Don’t go up the stairs. Instead jump over the railing and onto the pipes. Now crouch and go along the 2 middle pipes. Follow the pipes until you hit the wall. There will be a medkit and a clip. Now turn around and go back. Get off the pipes by jumping on the 2 on the left. Now go up the stairs to your right. Once at the top you will see a door. Go through the door and a maggot will attack you. Kill him then go forward. Once the door closes behind you it will lock. Now a zombie with a machine gun and an imp will come from your right. Kill them and there will be a zombie with a shotgun to your left. Go into the upper left hand corner and there will be a medkit.

Now go in the diagonally opposite corner and there will be a yellow cart with 2 clips on it. Get the clips and then shoot the grate just above the crate. Now a few trites will attack you. Kill them and 2 zombies with shotguns will come through the door to your right. Kill them and then go through the door. Once through the door there will be an unarmed zombie right infront of you. Kill him. Go forward a bit and a fat zombie with a wrench will be to your left. Kill him and turn around. There will be a door to you left. Go through it. Go forward a bit and a zombie will be to your left and trites will come from your right. Kill them all and you will see an elevator to your left. Go down the elevator. The elevator will break down at the bottom and an imp will teleport in to your upper right. Kill him and a lot of maggots will attack you.

Kill them all and there will be a door to your right. Go through it. To your right there will be a door. Go towards it. When you get to it a pinky demon will attack you from your right. Another pinky demon will attack you from your left. Once you kill them another pinky demon will come up behind you. Once they are all dead go to the door. To your right there will be a medkit. Pick it up. Now go to the window to the left of the door. It will get broken by flying objects. Now jump through the broken window and to your right there will be a locked cabinet. Open it using the keycode 123.

Inside will be armor, an ammo belt and some hand grenades. Now turn around and to your right there will be some stairs. Go up the stairs. To your right you will see some crates. Jump over the crates and into the corner and there will be some bullets. Pick them up and jump back over the crates. To your right there will be a door. Open it by using the control panel to the right. Once inside there will be a control panel to your left labeled. ‘Exit Alpha labs 3’. Press the button to move to sector 4.