Model Engine Builder

Build, run and collect model engines in your own pixel-art workshop. Fit the parts, tighten bolts, adjust the settings and time the ignition across four scored stages. Put finished engines on your shelf, take on control and response tests, or try Free Run without a time limit. Use the throttle, adjust the load and start or stop the engine. Improve your score and compete on the Google Play Games leaderboard for each engine. Explore 15 engines, including an inline three-cylinder, flat-six and supercharged V8. Four are available from the start. The other eleven can each be unlocked on this device by watching an optional rewarded ad to completion, when one is available. A one-time Remove Ads purchase removes ads and unlocks all 15 engines. Core gameplay works offline. Online leaderboards require internet and Google Play Games sign-in; ads and purchases require internet. Progress is saved on your device. Engine behavior and readings are game simulations.

Three new reward-unlock engines: inline three-cylinder, flat-six and supercharged V8. Improved workshop goals, engine collection and same-rules personal records. Rebalanced four-, six-, eight- and twelve-cylinder challenges. Existing online leaderboards and records are preserved; each new engine has its own board.