From the Humble World Oceans Day Bundle, which is weird because I didnt realize Brothers had anything to do with the ocean.

And speaking of games in the ocean bundle that aren't actually oceany, here's a key for Guns of Icarus Online: VLZ7J-NNY?V-DP2L7
? = what seven did to nine. this is seriously the only riddle i know for these sorts of missing-number key giveaways.