Hey!
I’ve added Game Dev Tycoon to my Steam library as a non-Steam-game to use the Steam-Overlay.
But everytime I open the overlay it freezes and I have to open the taskmanager to return to the game.
Win 7 SP1
latest Steamversion and latest graphic drivers (non-beta)
GameDevTycoon-132.exe
Great game by the way 
I doubt this would be officially supported until (if) they make it through Steam Greenlight?
http://forum.greenheartgames.com/t/game-dev-tycoon-is-now-listed-on-steam-greenlight/112
That’s a serious bug with steam and could (not would!) hinder the game from being greenlit on steam.
Greenheart needs to know this kind of bugs before this time so they can counter the issue.
AFAIK there are no requirements to being greenlit. Considering that all games are considered, including those with early builds, and those submitted by random users, I don’t feel like having a particular Steam overlay bug will hinder its chances at all. It’ll be a requirement for publishing on Steam, but not for the Greenlight program itself.
I tried to add the program to Steam to utilize Steam Overlay.
Didn’t work, and I’m out of ideas how to make it to work. I am Screenshots Addicts. =P
i don’t think so, there are some very old titles on steam which have problems with overlays like steam or xfire and they simply deactivated it by default, e.g. “the guild”