Driftland: The Magic Revival

A faster way to get this is to make your own custom map for this using the editor, just put a treasure next to an explorer, do it 100 times, save your map, go to main menu, play your custom map, pause the second it begins, make a save, unpause and watch as you will open 100 chests. Reload.

You can get this by hosting a MP game against the AI, if you win, you get it.

No need for other real life players.

You cant pause time in MP matches and do stuff, you can pause it to use the menu though.