Blob Wars: Metal Blob Solid 
Though not the hard-hitting action title its gruff hero might imply, Metal Blob Solid offers well-designed levels and demonstrates the amateur ingenuity of the early open-source game movement.
Tagged: open source
Blob Wars: Metal Blob Solid
Crystal Pixels 
Go inside a void of glistening lights, created by its programmer as a personal place to be alone. You can explore it if you can control it. Maybe we’re not supposed to play this.
Enigma 
This nearly impossible puzzle game with over 2000 levels is so absurdly complicated that it’s a spectacle.
The Frogs Of War
Developed sporadically for two decades and based on a bizarre dream about lizard men, The Frogs Of War is an perplexing game that follows no other.
Heroes 
If you packed as many features as possible into a version of Snake, it might look like Heroes.
kiki the nano bot
Gravity, space, and direction are torn to pieces by kiki the nano bot‘s mind-bending antics, possibly too much so.
Kobo Deluxe
The awesome action in Kobo Deluxe moves so smoothly that you can play it without thinking.
Liquid War 5 
From the bones of the strategy genre comes this liquid-y war game where fighting is about filling up the right spaces.
Magus 
In place of plot or a focus on RPG stats, Magus lets you wander.