Hello! I hope someone will see this post and help me out. I've bought the Bundle for Ukraine a while ago and I just got to A Short Hike. I've read that the Steam key will be provided with the purchase of the game,  don't know where to find the Steam key though? I like having my games in my Steam gallery, so if anyone can help me I'd greatly appreciate it :)

Steam keys are not included in this bundle.

You can add games manually to steam launcher, but it does not give you typical game features like achievements. You can use the steam overlay functions.