Grindstone, the match-em-up puzzle game that's all about killing lots of critters on your way up a mountain, just got even better with the Lost Lair update, which is out now.

The update adds twenty levels, new gear, a new area, a new enemy, new weekly challenges, new story and a new cutscene. Phew, that's a lotta new.

The Lost Lair is an abandoned grindstone mine right at the top of the mountain, with minecarts, "needlessly large explosions", and stalactites to add to the list of Things That Can Kill You. The update is available to download now, and is free for anyone with the game.