Oh, that's something I've been wondering, keys. How do they work?
Click "Add a Game" on the lower-left corner of the steam window, then "Activate a Product on Steam", then enter the product code (something formatted like AAAAA-BBBBB-CCCCC generally) that the person giving you the key will send you, and if it's a valid code it'll add the game to your library for free. One use only per code obv
Excellent!
Then I'm in for the keys, @paperwarior!
Alright, I'll give you one. I have: -Guilty Gear AC+R, of the X2 series, which is complete and a personal favorite, but doesn't have really anything in terms of a tutorial, being from a little while before that was a standard feature. -Guilty Gear Xrd Sign, which I don't actually own on Steam, but it's a previous entry and I can't see myself playing it that much on my laptop or anything. It has a tutorial. -Rivals of Aether, which is more of a Smash-Bros-like, modeling itself off of Melee.
(Sorry for the late response...) I take Guilty Gear AC+R. =)
Thank you all for your recommendations, as well. ---
Here lies the sig of BK_Sheikah00, who swore fealty to the Gurus of Board 8.