For the next three days (until Steam Dawn on the 27th), the multiplayer car combat game KEO is free in the Steam store.
KEO was free for a limited time once before and it has the looks of becoming FTP soon but for now, it still has a retail price and this is a limited time window to claim it for free so grab away.
Witness thales.ulisses! He was first shiny and chrome!
Let the games begin!