There are no cheats in Portal.
Ok Portal still alive is bonus levels and there is a game called portal 2 already
Portal is the original game in the series. Portal: Still Alive is just extra levels added to the game.
Ellen McLain
Still alive by Jonathan Coulton from game called Portal.
Portal-still alive
no
Cheat codes
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Yes, cheat codes are usually used during development to check that certain features work (e.g. if the game still works after you have more than 999 cash) and are left for users to discover. Plus, how would anyone know about a game they didn't invent before it came out. You would not know how to create cheat cheat codes if you had no knowledge of the game.
(ps3 trophies same with 360 achievments)
I don't know. I've been searching that on Bing and the full version just came out, so it still shows the demo version codes.
Ther is none nentendo made it hard on DS but you can still makes lots of money on it