A little while ago we reported on an upcoming PC game called OilRush, a action-RTS-tower defense game that's takes place on a future Earth where you have to defend oil rigs out in the ocean against attackers. The development team for the game is the same team that also makes the Unigine game graphics engine.

This week the developers announced that it is taking pre-orders for OilRush for $19.95 in both Windows and Linux versions. The price will allow players to access free beta versions before the game's full release along with exclusive "game related materials". OilRush is currently scheduled for its official launch in June 2011.