[ Thanks to kiterunner for this link.
“Oil Rush is a real time naval strategy game with stunning
graphics and gameplay. This is one game that kept all of us
waiting. We had listed Oil Rush right at the top of 12 best paid
games for Linux. Now, Oil Rush is available for installation via
Ubuntu Software Center. Note that you can only pre-order the game
right now, but you also get access to beta version of Oil