MentalCalculation Minus N gamesBookmark the permalink. Release date: Dec 14th, 2012 Price: Free Version: 1.1 Seller: tatsuya itoh Buy Now STP SCORE: Not yet reviewed Description Screenshots Let’s strengthen the brain by the mental calculation. The level is nine. Aim at the best score in the world. Related Games Star Trek Rivals Wizard Ops Tactics Haunted Hollow Draw Something 2™ Talisman Prologue HD Bookworm Heroes Lumber Jacked Cut the Rope: Time Travel Stay Alight Mittens