Tumblestone

Tumblestone is the first original action-puzzle game of the past fifteen years. Race your friends in multiplayer or challenge yourself in story mode. Solve progressively more difficult and creative puzzles, help a sausage make friends, and find out what happened to the Tumblecrown. Your friends play for freeYou can generate an unlimited number of free Steam keys to send to your friends so that they can play with you online, up to five games per day. Key Features

• Competitive multiplayer: Tumblestone's intense puzzle-solving action will turn playing "just a few more rounds" with friends into a late-night Tumblestone marathon.
  
• Local multiplayer: Up to four players on a single computer.
  
• Online multiplayer: Play online against your friends or make new ones using Tumblestone's ranked matchmaking system.
  
• Bots: Have an open slot? Play against the computer. But can anyone withstand the punishing Nightmare bot?
  
• Story mode: The 40+ hour story campaign will test your puzzle-solving prowess. Featuring 10+ gameplay modifiers, challenge puzzles, and boss battles.
  
• Arcade modes: Kick back and relax with the casual Marathon mode, scratch an intellectual itch with the Infinipuzzle mode, or get your blood pumping with the fast-paced Heartbeat mode.
  
• Leaderboards: Online leaderboards let your friends know you're better than them.
  
• Quests: Hundreds of unique quests to complete.
  
• Stats: Rank up, then compare how you stack up against your friends.
  
• Personalization: Choose from a dozen unique characters and environments.