Found some old keys that weren't revealed on Indiegala.
So they SHOULD work but knowing Indiegala they might not.

Also if anyone knows what I might do with games that have no serials available on Indiegala?

AND

If a game has been generated with a gift link but when you enter the email it just says error try again in five minutes no matter how much time has passed? (Obviously, I'll contact Indiegala support but was just wondering if anyone has any experience with this.)

Also happy December everyone!!! Christmas (Holidays) is (are) right around that corner! :D

EDIT: Made a thread: https://www.steamgifts.com/discussion/1pQin/indiegala-problems-giveaway-inside