What game do you guys want for a giveaway?

I'm making another puzzle for a giveaway, but don't know what the prize should be yet. It will be along the lines of this and this, only easier and centred on geographical facts, in particular Europe and the US (most of the forum users I'd imagine). If you think that's something you'd try, please suggest a game below (nothing above $15 or so please @ sale price). I do have a set of complete Civilization 5, which seems fitting; however I need other ideas as well seeing as this could turn out as a two-game giveaway again.

Decided not to try and make a user-picks giveaway, because sale is ending soon and I can't just buy all the games to cover all the bases now! So I'm going to do this:

1 Civ 5 GotY as the link from puzzle. All solvers who don't have can enter.

2 Civ 5 Gods and Kings (plus Korea and Ancient Wonders DLC) expansion inside the puzzle description, ending 1 day later. All solvers who don't have can enter, including winner of #1.

3 A game (The Walking Dead as a placeholder) that is available for all solvers who don't enter for #1 or 2, ending 36 hours after #1. [if support allows it, the winner will be able to choose from TWD or from a pre-determined pool of games of similar value]

4 Another game (will decide soon, depends on re-hash sales) from a puzzle link inside the description of #1, with only people who don't win any of the above allowed to win (ok to enter and lose #1+#2 or #3), ending around 72 hours after #1.

Just waiting on support now.