Legend of Grimrock is described as 'Grid-based dungeon crawler featuring first-person exploration, real-time combat, puzzle solving, character progression, survival elements and custom dungeons' and is a Turn Based game in the games category. There are more than 10 games similar to Legend of Grimrock for a variety of platforms, including Windows, Steam, Mac, Android and iPhone apps. The best Legend of Grimrock alternative is FreedroidRPG, which is both free and Open Source. Other Legend of Grimrock like games are 7 Mages, The Deep Paths, Divinity : Original Sin and Wizardry.
Same gameplay, quite similar graphical style.