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.
Bridges level introduce a bit different graphics. You have to defend the area from the aliens. Thanks to bridges you have a clear shoot but beware - if any aliens would slip past you won't be able to stop him.