In Marine: Alien Invasion you assume the role of the commander of the security forces on the military science vessel "Osiris". After the interrupted space jump weird things start to happen. People are lost, strange shapes are being reported lurking in the corridors. It is your duty to investigate what's happening and defend the ship against deadly alien plague. Marine: Alien Invasion is a Sci-Fi themed tower defense game coming to android and windows phone this year.
Another screenshot from the medbay area