[W] Someone with a very large library on steam to try my random keys and find out what they are!

So this is a bit of a weird one, but I have found an old google doc with ~15 steam keys that for whatever reason, I had not saved the names of the games (so dumb!). I'd like to know what games they are, since maybe I have something valuable in there that I can use for trading.

But the only way you can find out what game it is, is by activating the game on steam. However, if you already have that game in your library, it will not activate it and it will tell you the name of the game. My library is pretty small, as I only activate the few games I really want to play, the rest I trade/sell.

So that's why I'm looking for someone with a really big library (I've seen guys here with over 3k games), to try them out. Whatever games end up getting activated, you can keep! The rest, you have to promise to not use, and just tell me the name of the game (so I'll find someone to trade them with). I will only do this with someone that has a very high trading rep, since it's very obvious that you could just lie to me about what games you found out and I'd like to avoid that :)

Also, I have some keys for games that I know the names of, but I got them from shady traders in the past. I haven't posted them to trade/sell since I'm worried they don't work, so I'd like someone to test them. So if there is anybody that has any of the following games in their library and wants to help me out, let me know:

Squad, Tomb Raider GOTY, Hitman 2 and a Call of duty game that (again!) I had not saved the full name of.

SGS rep.

IGS rep.

GTrep.

EDIT: Thanks for offering to help everybody! I found someone with 21k games that is helping me :)