What it lacks in graphics it more than makes up for in gameplay
The lack of health and mana regen was a brilliant decision by the developers, if you lose your health, you need to adapt your game, make sure you don't get seen and carefully plan your attack. The A.I in the game doesn't roll over and die, and if you prefer a head on attack, you won't last long, especially when you get later on into the game.
The game's graphics aren't great, but the game itself is. For a game about an assassin it's at its most enjoyable and rewarding when you choose not to kill. It's a steampunk game that takes the best of stealth and fantasy games and delivers a unique and thoroughly enjoyable story that you want to play more than once, an entirely different way.