Galactic Civilizations III is more of the same with some nice upgrades and a handful of new features, and I have no complaints about that. A great starting point for new players, and an even nicer reason to take up an old addiction for veterans.
Deathtrap is a fun co-op game, but fails to deliver in single player. Some skill and trap options are less than amazing, but overall they do pretty good. Gamepad support has some problems, but mouse and keyboard users shouldn't have any issues. Give it a try if you like playing with other people.