UFO: Aftershock

Minimum:
OS: Windows 2000/XP
DirectX: 9.0c
Processor: 1GHz (Single Core)
RAM: 512MB
Hard Drive: 4GB
Video: 128MB

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Recommended:
OS: Windows 2000/XP
DirectX: 9.0c
Processor: 2GHz (Single Core)
RAM: 768MB
Hard Drive: 4GB
Video: 256MB

Release Date: 21 October 2005
Links: Official Site

Description

The following description was taken from Here

The year is 2054. Fifty years ago, something terrible happened and the surface of Earth became uninhabitable. The remnants of humankind escaped to an immense flying island, the Laputa. However a revolt against increasingly rigid and corrupt human leadership of the island escalated into a conflict that eventually destroyed it. The survivors of the survivors flee once again. Can they reclaim the Earth from the unknown forces now holding her in their grasp?