I thought it might be nice to have a thread full of great freebie games, so please post anything you've had a lot of fun with.
My choice is this remake of Chaos, a classic TB multiplayer game that I used to play endlessly on my old 48k Spectrum with friends. You basically each control a wizard who can cast a spell and then move each round on this one screen. The spells are mainly monster summoning spells, each of which have a plain but cool wee animation, destructive spells (eg lightning bolt) and other kinds of spells that influence the game. It was the first game (iirc) ever made by the Gollops, who went on to create the X-Com series, and it is still as much fun as it ever was. So long as you don't need super 3D graphics and you have some friends to play with you can have a lot of fun with this game. I'm still waiting for an internet version of Chaos, a promising version was being developed a few years ago but it was never finished or released to the public. You can download a more basic remake of it at the link below.
Chaos Funk download