Codes for the game Perimeter
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To unlock all levels, you just need to modify one file.

Open the game's root directory, go to the "Resource" folder, then the "Saves" folder, and inside it open the "Profile0" folder (or another, depending on the game settings) where you'll find the file "data". Open it with any text editor. The line "lastMissionNumber=28" indicates the mission number you have reached. The last mission is 28.

It won't be boring right away :) IMHO...