MONSTER HUNTER: WORLD

You can get both the Skilled Steamworker and the Eager Engineer around the same time. After you finish the first few missions you will unlock the steam works mini game. The basics of the game are pretty simple, press three buttons (A,X,Y) in a specific order multiple times until you win and get your rewards! You will unlock the first achievement by getting 20 separate successful sequences and the second one is for getting to the overdrive state. The sequences themselves are random and the numbers above the buttons are for the previous set of button combinations. To get overdrive you must keep playing and winning sequences until you get a hilarious cutscene, after which you will get your achievement.

Once you unlock the Steamworks mini-game after a few story quests in the new land, keep playing it until a red bar appears and reaches the end. It goes yellow, orange, red in terms of colors to fill up. I used about 250 fuel to get fully into overdrive which was only a handful of ore.