Almost all of the King's Quest and Space Quest games have just been released on Steam as the King's Quest and Space Quest Collection respectively. These games represent a big chunk of gaming history from 1984 - 1995.
It seems they are pretty much identical to the 2006 CD Collection releases, which use DOSBox. This means the older games are actually more likely to work on newer Windows systems than the newer ones, and all games are not guaranteed to work. :(