For those who haven't played Legends of Grimrock before: it's fun, but some of the puzzles are difficult to the point where you'll stop playing the game or look up solutions online.
Some of the puzzles are difficult to the point where even with the solution online it still means you have to repeat it 5-10 times to pass.
It's very old-school, meaning a lot of the puzzles are rather mean and frustration without looking up a solution.
I actually used a speed hack to slow the game to 25% speed for one puzzle, because it needed a perfect sequence of moves to make it to a switch in time and it wasn't worth practicing until I could do it at full speed.
Then I quit because a solve-riddle-and-put-object-in-container puzzle required a rock, and the last time I saw a rock was 6 dungeon levels up. I get that "keep everything" is a thing in the old-school dungeon game, and I had the other stuff I needed but rocks? Who keeps them around just in case they are needed?
Some of the puzzles are difficult to the point where even with the solution online it still means you have to repeat it 5-10 times to pass.
There's a small community modding new maps for the game: http://grimrock.nexusmods.com/mods/top/