UFO: Alien Invasion is a game very similar to the X-Com series games (UFO: Enemy Unknown, X-com 2: Terror from the Deep) especially when you turn on isometric view. Description from the official site:
UFO: ALIEN INVASION is a squad-based tactical strategy game in the tradition of the old X-COM PC games, but with a twist. Our game combines military realism with hard science-fiction and the weirdness of an alien invasion. The carefully constructed turn-based system gives you pin-point control of your squad while maintaining a sense of pace and danger.
- Offitial site: ufoai.sourceforge.net
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