Worms Revolution

Best way to get this is that you on campaign stage Sewer Training: 2 Hazards. Instead of killing the worm with a mine, drop them down the pit behind him, when you stand on the Wrench's edge, press to open weapon menu and to drop a Mine.

You will get this one easily if you prioritize Mines during Campaign and Puzzle modes, DLC counts aswell. Otherwise you can boost this in Versus mode, as it's drop mines and not kill worms with them, so you can just stand over a pit and place mines over and over again, You can set Mines to unlimited on the Customization menu.