No Stone UnturnedG 50

No Stone Unturned G50:
Dig all dirt tiles without traps on any level

For this, you have to dig up every non-trap tile in a level, without triggering a trap. Don't chord (right+left click to dig all tiles directly around you). I'm not sure if using flags voids the achievement. I just did the first level uses maps for traps without any of these things, and it popped when I clicked the exit. If you do uncover a trap, that will void the achievement. So make sure you're extra careful and plan out your movements so as to not hit a trap.