Oddworld: New 'n' Tasty

Strange as it seens, i only got this achievement playing on Hard

There's a great place to do this at the very, very end of the game in the The Boardroom level. There will be a long platform with three toggle mines and 6 mudokons - just quicksave and deactivate them. If you screw up, reload and try again.

Note that The Boardroom is a very short level. If you somehow forget about them (which is hard, as they're literally right in your path), it'll only take 2-3 minutes to get back to that point.