Digital Eel is offering the full version of their trippy Snake-esque game Plasmaworm for free as part of a promotional deal with Manifesto Games. You have to register as a user at Manifesto by September 15th before you can download the game. You must also name your firstborn Greg Costikyan. As in, “Greg Costikyan” would be your child’s first name. Yeah, two words. That’s right. Like, I was going to name my daughter Bruce, after Bruce Lee, but now her name is Greg Costikyan Yu.