Untrusted

Untrusted is an an open-source puzzle game based around programming. The game is presented as a rogue-like from the early days of gaming, where the player can move the character around the playfield using the cursor keys. To the right of the playfield there is a console displaying messages and the source code of the game in Javascript. Each of the game's twenty-one levels is initially unbeatable, so the player needs to modify the game code with select Javascript commands in a way that would allow him to win the level.