You can do this achievement with either a bot or an extra controller!
There are various mini games I do believe 6 in total but you may only have to play 2 or 3 times before you get to Twin Temple. If you do not want the game to randomly switch to another mini game make sure you put your setting to Linear!
In this game, if you want the little artifact to hold to get points to go for a couple other of grindy achievements go for it just run up to the extra controller character and you will snag the artifact! But be careful because after the diamonds the artifact will catch on fire!!! Just give it back to the extra controller and make your way far away to not be blown up!
Once your extra controller character has blown up the pot of gold will appear in the middle of the room, do not forget to grab that or the achievement WILL NOT pop! When you grab wait a few seconds after and you win Twin Temple the achievement will pop!