If you like old school games, Oddworld: Abe's Oddyssee is free for 24 hours and then it is yours forever http://store.steampowered.com/app/15700/
You should inform me of these sources My current sources are the the HG RSS feed and my own searching around on the store.
a thing i can tell about this source that it's a group in steam that has source in it's name. that's the only source i can give you about this source.
I used to try and figure this game out all the time, never could. Now I can finally try and play it. Thanks.