As they promised yesterday, the small team at Almost Human has released the Legend of Grimrock Dungeon Editor alongside a v1.3.1 update and a 50% off sale that gives you absolutely no excuse to not own the puzzle-heavy RPG going forward. What's more, there's a standalone patch available if you'd rather not wait for Steam to get updated:
After several months of break-neck speed development, Almost Human is proud to release the most anticipated modding tool ever, the Dungeon Editor for Legend of Grimrock! The Dungeon Editor is a free update for everybody who owns the game.
If you haven’t purchased Legend of Grimrock yet, we are also launching a sale starting today with 50% off the price if you buy directly from us. Buying directly from us is the best way to support our future game projects, and you get a Steam key and a standalone version of the game with the Dungeon Editor.
If you have already bought the game, here are the instructions for getting the free update:
Steam version: Legend of Grimrock should automatically update to version 1.3.1 in the next couple of hours. If the download does not start automatically you can try selecting Verify Integrity of Game Cache in Legend of Grimrock -> Properties -> Local files tab. Restarting the Steam client may also help. Please be patient as it may take several hours for the update to propagate through Steam servers.
Direct purchase from Almost Human or GOG.com: you can download a patch here. The patch updates the game from version 1.1.4 to version 1.3.1. The patch only works with the standalone version of the game (not the Steam version). If the patch fails to install for some reason you may also redownload the latest version of the game from Humble Store or GOG.com.