Quake 2

Most of the levels here are straight forward. With no real short cuts but one; I'll get to that. The first level you can just rush into the door you need to go into (see video 2 at 6:56-7:08 Re-cam 16:00-16:13), it's done in 8 seconds.

The second level has no shortcuts and you have to do things in order. There is one thing that is easily missed; taking the commanders head. After you go down into the lower floors, after you lower the bridge and walk across it, there are 2 buttons on the side of it. Jump across from the bridge and push them, then go back from where you came in untill there's a doorway on the left. Go in it and go on the elevator, grab it and proceed down it. Then return to the first level. Once it loads, walk into the door straight ahead on to the third level. (If you still can't find it, look at video 3 at 00:12-00:40 and on re-cam it's 17:05-17:35)

The third level is quite easy. You can skip the whole platforming puzzle by rocket jumping onto the platform. See it on video 3 at 1:46-1:46 and in re-cam at 18:50-19:00. It's quite easy to do the jump puzzle regularly, but it's just annoying as hell.
Then go through the pipe, keep on going in until you see a big opening on the left of this room. There should be some creates, some med-kit's and a door on the other side of the room. Go into the opening on the left then turn around and look up. Once you see a window and a switch, quad jump into the window. Once you hit the switch go to the right (looking away from the window) and exit the level. See it in video 3 at 2:02-2:18 and in re-cam at 19:05-19:22) If you can't quad jump, just continue thru the rest of the level normal. It's not to hard. (see FAQ at the bottom to learn how to quad jump)

Now the second to last level of the set; You can skip 4/6 objects here if you rocket jump into the window at the start of the level before you enter the building (the windows above the door). Shoot the computers on each side of the walls through the bars (I suggest using the grenade launcher to shoot through the bars and saving before you rocket jump and before you shoot the computers). Then go down enter the door and take a left into the door, then a right, you'll see a rocket tank. If he didn't see you, rush into him, duck, and walk past him, then run to the elevator (or rocket jump up if you want to). If that's not working before you rush into him, rocket him so he steps back and then rush past him. Once up, go around the cat-walk into a door. Once past that take a right, you'll see another tank. You can again rush then duck, or rocket and rush past. Then go through that door then go to either side, as the exit is in the wall behind it.
See how he beat this level check out video 3 at 2:23-2:49 and on re-cam at 19:28-19:55.

The last level of the set is quite straight froward. Just keep on taking rights, soon you see that there's an opening on the left; it is the only option. So go left and you will see a big pipe laying on the ground, after you go through the cave. Once you do, save, jump behind it and take a left, walk into the end section. An air strike will be called in after you put the air strike beacon on the side of the pipe. A door will open on the right side with 2 baddies coming out. You'll be safe inside that bunker if you're low on health. Come out after the air strike and you'll see the door that was locked by the beacon now is blasted open, go into it and you will be at the exit soon. See this level on video 3 at 2:49-3:50 and in re-cam at 19:55-20:54

Level set: Hangar
Hangar1
Lab
Hangar1ii
Hangar2
Command
Strike