Indiana Jones and the Last Crusade

As you progress through Outbound you'll find four landmarks to visit with mini puzzles attached to them. The third one is the windmill, but to reach it you'll face difficulty as it's up a steep slope. In order for your vehicle to go up slopes, you'll need to upgrade your motor. This requires researching the motor upgrade and then crafting it, but it's not immediately obvious how to do this.After searching for a while you might be losing hope, but there's a simple solution. You'll need to drive to as many signal towers as possible and use download coupons at each of them until the option to dow