Although Portal is fundamentally a puzzle game, it still contains a plot, set in the Half-Life universe, which is revealed to the player via audio messages from GLaDOS (Genetic Lifeform and Disk Operating System, voiced by Ellen McLain) and side rooms found in the later levels.
Portal is a Puzzle/Action Puzzle video game for PC developed and published by Valve on October 10, 2007. It's rated Teen by the ESRB and 18 of our users have voted it 4.3 out of 5 stars.
Our newest cheats for Portal were added February 20, 2011.
If you use any cheats when playing, when you complete the game, a big "CHEATED!" will be displayed. You must use a save game that has no cheats to complete the game without the announcement.
Go into console (~) and type impulse 101 (make sure sv_cheats 1 is enabled).
Enter sv_portal_no_fail 1 in the command box it does not work on layers of non flat land.
Bring up the command bar and enter npc_create npc_ then for the npc name like gman or headcrab or even zombie.
After doing the sv_cheats 1 thing, press ` (~) to open the console and type: "noclip" and you will fly through walls.
After enabling cheats, type: "notarget" and enemies won't see you.
First, enable cheats. Then type "god" and you can't die anymore.
If you have already done the sv_cheats 1 cheat, then type: "impulse 101" and you will get the weapons from half life.
You first have to activate the console. Then press ` to open it. Then type: "sv_cheats 1" and the game will allow cheats.
In order to unlock the advanced chambers, you must first complete all 19 test chambers. The advanced chambers are then yours to conquer.
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