UFO: Afterlight (PC)
UFO: Afterlight is a strategy game in which you take control of ground troops and manage resources in an effort to defend your Mars base from enemy robots.
Score: 6.5

UFO: Aftershock (PC)
UFO: Aftershock continues many years after the events of UFO: Aftermath, with alien scientists trying to change Earth into a giant living organism. As one of the survivors of the original invasion, you embark on a mission to find out what happened to Earth, the people left behind on the surface, and the new visitors.
Score: 4.0

UFO: Aftermath (PC)
Despite some bright spots, UFO: Aftermath isn't a fitting sequel to X-COM, and, on its own merits, it just isn't a good tactical combat simulator.
Score: 6.4