XCom UFO Defense remains one of my all time favorites. This quasi-sequel represents a step backwards in my opinion. First and foremost the graphics are muddy and less detailed than the predecessor. There's little going one to make this game feel like a worthy upgrade. Weapons are mostly the same just reskinned except that some only work underwater and there's melee weapons. As much as many times as I've replayed the original, I couldn't bring myself to finish Terror. Once you start fighting the over armored lobster aliens battles become a long boring slog. My advice is to skip this and play the original with new mods instead.