KBreakout is a game provided by the KDE Games suite.
I love playing it and after going about 15 levels into it, I got interested in a few mechanisms and decided to fool around with its code. Turns out, something sinister is hidden within it
To enable the cheat mode in KBreakout, simply run it as the following (on *nix):
export KDE_DEBUG=1; kbreakout
Game should start as normal but now you can use L and S keys to add lives or shift levels incrementally. Use it wisely; I do so to explore levels (Turns out, hacking/adding levels is easy too!)