I'm starting this thread to share any game codes that I/you/we have duplicates of via Steam/Humble/etc. Share your own codes here, too! It's first come, first served.
If you redeem one, respond to the post saying you've done so. Then the code provider (or a mod) can
mark it out as being used.
And please only redeem codes for games you actually *want* to play, rather than something you just want to collect. It's nice to leave codes for others who will really enjoy the game and possibly spread the word!
Also, do not post any links to illegitimate torrents/downloads - this area is for keys you have rightfully purchased but do not need and want to share. As with any other place on these forums, linking to pirated games (or media of any kind) will get you an auto-ban.