There are 4 achievements to 100% this game. Firstly, you'll want to start a game up on easy (do not use custom games otherwise the 'play on all boards' won't unlock) and try and try to hit a mine, which will net you this achievement:
Remember, if you fail, take a picture of the board and don't use any flags while completing this board. As soon as you complete it, you'll net:
Complete a minefield for the first time without using any flags.
You must then complete the medium and expert boards as well without using the custom maps. You'll then net this:
Congrats on your completion!
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