I redeemed it. Thank you! Had no issues with the quiz :)

Two codes obtained as a gift from one game discord. I own one of them, and the other is not my cup of tea. If you want to claim them, you need to guess the name of the game.

The game is not available on GOG (yet, I hope). Early access on Steam, soulslike set in world of anthropomorphic animals instead of humans (one specific race of animals, not mix), from a small independent studio. Single-word name. Shouldn't be hard to find based on the clues.

If you take the name, use the n-th letter to replace (n).

(1)(5)XM9002C6B5DD788C Quake 2
XA(8)(5)B85227D8D455EB Hero's hour

Edit1: codes are now blocked as "This code is currently being redeemed by someone."
Edit2: the game is KRISTALA

https://www.gog.com/en/redeem/D2NL96F8F041EA386A

BioShock™

So, what is the answer to this riddle?

I was waiting with answer until they are claimed or released, but it's probably time to accept that ninja-bot got hold of them and is searching for buyer. Edited OP.

my bad. please, don't beat me. I've grabbed the Q2 key to have Enhanced Edition without dealing with Steam or stuff.
was sure that posted my THANK YOU but, guess, my memory sleeps with someone else.
so: thank you for the Quake 2 key.
the Hero's Hour was taken by somebody else, though.

It's Kristala: https://store.steampowered.com/app/1206410/Kristala/

but I was too late the codes were already redeemed.

Also thanks for the BioShock code!