henk brouwer: If you like Scorched Earth, check out Worms. That game just rocks
For me:
MW series
SE series
Worms series (Armeggedon being the only one I've played, but the others- II and World Party- are similar)
Mechcommander
Fighter's Anthology- I *really* wanted to like USAF, but I could never get it running right, stick didn't want to work. Not only that, it had problems at low altitudes, and guess which plane I used. Yup, the A-10.
Freespace 2
Phoenix-D