A very easy game to beat plus easy 100%. You can easily get this within 15 to 30 minutes. All of the achievements are main story. I got this when I bought it on sale a while back when I'm searching for obscure game titles.

Complete playthrough; 100% of achievements unlocked. A very short and simple 3D platform/adventure game, played from an overhead perspective. Owl Watch has a nice visual presentation and is fairly satisfying and relaxing to play through, while it lasts - its three stages won't take more than 15-20 minutes to complete.