Hey!
"Clickteam Fusion 2.5 Standard" from "Humble Clickteam Fusion 2.5 Bundle"
Disclaimer:
Don't enter this GA if you are unwilling to allow this GA to be cancelled/deleted if there is an issue with the key (but I'm 99.99% sure it's fine).
BUT if there is a problem, I will slide you some other games to make-up for you using those precious SG points here :)