I've never played the UFO series... The only 1C games I've played are E5 and 7.62..
I'm too much into realistic guns.. Although I've made an exception for Fallout series. Is UFO: [which one is the newest I should try?] like turn-based tactical also? or real-time? I remember trying the old one, free download from abandonia software, but no manual came with it.. and last time I used dos was before windows 95.. so no way to figure the different keys and what they did...