On the chapter before the last chapter...when you are in the citidel You'll have to go along a very narrow cliff side to a pipe leading to the inside of the structure. After following the confusing maze of metal, You'll come to a large open room with a bunch of those pods that Dr. Eli was in. There are two poles they follow and only one of them is the one you have to go to...

Step off the ledge to the small bridge and there will be a small walkway where the pods stop turn to face you and open up. DO NOT get in the one closest to you. Instead walk around it and look at the second one. Step inside by pressing A and lay back and enjoy the LONG ride. While in the pod. You will see several guards and Striders..but they don't notice you and you can't do anything to them. If you take the one I told you not to...it will be a short ride to a beam that kills you instantly.

After the long ride. You will be relased into a room that takes all you're weapons away and you can barely move. Your gravity won't get desinegrated because it..Defies Gravity...but instead of it getting taken away from you...the desinegration rays charge it up...so it now instead of orange is blue and a LOT more powerful...you'll be able to pick up heaveir things and even bodies of guards...This being your only weapon for the rest of the game gets kind of frustrating...but I love the way it can pick up the plasma balls and launch them...

You will confront a strider later and all you have is yur gravity gun. But 3 or 4 shots to it with plasma balls should take care of it..and you won't be hurt as much since yur suit can now hold up to 200 points of recharge...Another pod ride ends in the finding of the last chapter.."DARK ENERGY" more common sense riddles and following Alex's directions will end up in you having to destroy the teleporter with plasma balls...but while doing so several of those helicopters will try and kill you so take them out while hiding behind the 2 pillars the level provides..destroying them will give you a clear shot to the teleport machine. Destroy it and you've beaten the game...

The end is for you to find out...watch the credits for a REALLY short but somewhat funny video...