[Me] Some Free Keys

Ey. Got a bundle, half of the games were stuff I wanted, half of them weren't, gave away most of the rest, but these ones have no giveaway value so instead of having someone wait
why not just let people have them now? (Dunno where else to put this, so this seemed like the best category)
With a stipulation of course to prevent bots or anything like that: just figure out what the ? is.

If you redeem any of these keys please leave a comment, I beg of thee.

Deep Dungeons of Doom: T3F7P-J2L6Z-?M?BT (?=first letter of the sound a duck makes) (ACTIVATED)
Hammerfight: MGFAI-DV22?-57TZI (?=the first letter of the game's name) (ACTIVATED)
Oknytt: XJW??-7HB9P-P8K2W (?=the first two letters of Mario's yellow-hatted nemesis' name in sequential order) (also I tried using the key but it turns out I already had the game so the key may or may not work cause i'm an idiot oops) (ACTIVATED)

And if anyone has a hard time figuring out what the ? are, I'll give more hints, it's mostly just a way to prevent bots from auto-grabbing them or whatever.