Two games have been guessed, three to go. Here's extra hints for these;
#40: Probably the coolest special edition I own is the one for this game, it comes with a wooden miniature of an Onager that you could build yourself.
Hint 2: At launch the game was criticised pretty heavily by players however. With a slew of updates adding things like a family tree and overhauled politics, much of this criticism has subsided.
#37: Technically just a sprite swap of another strategy game, and considering the franchise this is part of, shouldn't they have done more?
Hint 2: The basis for this game is a famous rts from an otherwise completely unrelated franchise and developer, but my game's gameplay is basically exactly the same, down to the building types and technology (in the sense of advancements and upgrades for the purpose of the gameplay).
#36: A handheld entry in the series which unlike its console brother actually is a numbered sequel.
Hint 2: These two games were released pretty much simultaneously.