Can I play Dungeon Keeper 2 or Zeus and Poseidon on my computer running Windows XP?

If you have original copies of the games from when they were released, it’s possible but very tricky.

For best results, I’d suggest buying the games from http://gog.com. They’ve all been updated to work easily on modern computer systems, and they’re only a few bucks:

http://www.gog.com/gamecard/zeus_poseidon

http://www.gog.com/gamecard/dungeon_keeper_2