If you like Atari you might like this one but a fair warning... It's not very excitting. Gameplay is like Donkey Kong where you climb the ladders while avoiding falling barrels, birds and other nuisances. There're some stages where you get to da choppa and fly like maniac similar to Choplifter for Atari (no get to da choppa pun intended). Some stages require you to use sonar on your boat and receive incoming signal through depths of ocean. Difficulty wise it have some small challenge. For '70s I think this game would be a good contender for game of the year. Complete the story and become the master chef of oil rig!
One more thing, don't break the system.

Wonderfully psychotic in that it casts Greenpeace rainbow-coloured balloons, whales and other sea life as enemies. Slightly too complex to be a real game from 1975 but the devs completely committed to the bit, which is always good to see.

A little minigame about how to work an oil rig and slightly suspicious logs about said oil rig's activities... But that's nothing to be concerned about!