Rig Attack by Rajcsányi László is a retro action game, made with GB Studio.
Your goal in the game is to fly a helicopter from the Heli-pad on an Oil Rig and patrol the surrounding oil fields. You need to re-fuel, or else you will crash into the sea. To re-fuel, you land on any of the Heli-pads where an attendant will fill you up before take off. At any time in the game an enemy submarine can appear firing deadly torpedoes. To safeguard your rig you must fly over the submarine and drop your bombs, avoiding his missiles.