Evilingo
Evilingo is a short parody game inspired by Duolingo. Instead of teaching you languages, it teaches you how to be evil.
I built it as a personal challenge in 32 hours, experimenting with how far I could push the "friendly encouragement" style of language apps into something a bit more evil.
I don't think it is possible to learn anything from playing this game, but you can try to have fun!