Thief is a very good stealth game as the name suggests (in English), you play as the Master Thief Garrett.
The scenario is vague but hold water, the gameplay is not bad, but this is not an open world.
You can fly everything you find on your way and you decide how it seems the best where not to go down the enemy that prevents you from moving forward during this wandering story.
In terms of graphics, the characters could have been done better, otherwise the rest is "sufficient" for this stealth game.
At least 1 hour You will need to spend much to enjoy and discover the game, which is pretty amazing when you play for the first time.