Thank you ExiL0n! I'm in.
The one game that should be in every library is Heroes of Might and Magic III.

Thanks, count me in.
Rollercoaster Tycoon is the game that every gamer should have in his library.

Funny, approaching 50 posts and no one has said Keane.

Oh, come on, that would be unfair! Everybody knows that Jack Keane is not a game, it's THE GAME: winner by acclamation of every "best vg ever" award. Let us give some space to noobs like Black Isle, Looking Glass Studios, Sid Meier and so on! :)

Cool, I'm in, thanks! (both to you and GOG :D)

As for your question, I'd say Planescape: Torment and the Mass Effect Series!

Yeah, GOG fellow are pretty awesome.

For the games every player must have:
Ikaruga + Dark Souls = 19th breakdown!!! (I'll pray every day so both come to gog someday in the no so far future)

Thanks!!!

Many thanks, I'm in.

King's Bounty:The Legend is a game often missed so that's my choice.

+1

Papers please is such a unique experience everyone should get it.

Im in. thanks for the giveaway

IN!
I would say Doom and Duke Nukem 3d for being so groundbreaking (FPS) games for their time

I'm in. Hmm...every gamer? That's a tough one, but Balder's Gate 2 has to be right up there if you ever do RPGs.

I'd like to enter..

I think Sid Meier's Alpha Centauri is the best turn based strategy game that everyone should play.

Thank you!

I'm in, thanks, with another vote for Planescape: Torment

Thank you. Fallout shouldn't be missing from anyone's collection. Too bad it was removed from sale because a rights change. Also you shouldn't miss the Civilization series, the D&D collection (Torment, Baldur's Gate etc.). I also loved the Knights of the Old Republic games and I can highly recommend the first Dragon Age too. And there are literally 100eds of other great games.

Thanks, ExiL0n, for giving away the code that was yours, plusrep! I'd like to be in, please.

MDK I'd – once more – recommend anyone should check out. Shiny sure created a unique game.

im in now, right?^^

the game i recommend as everyone-should-have-this-one would be

TESIII : Morrowind