I've spent way too many hours over the years doing very little in Garry's Mod. A great sandbox to play in, I highly *HIGHLY* recommend the Stargate mods

I had to come back several times to persevere through it, but it's well worth it. A thought-provoking ending and ingenius time manipulation mechanics.

100% pure eclectic side-scrolling platform mayhem. Absolutely brilliant, and all games need to pay this much attention to perfecting controls.

As a Trekkie, this is the only Star Trek game that should be played. Great starship gameplay, some disappointing negotiation and pretty loose F2P.

Too big to finish, but Witcher 3 has real and tactile consequences to the way you play. Choices aren't just in dialogue, but actually your actions.