All Working Sonic R Cheats - PC

Radiant Emerald course
Finish in first place on each normal course.

Play as Dr. Robotnik
Finish in first place in the in the Radiant Emerald course. Alternately, successfully complete all levels.

Play as Hyper Metal Sonic
Collect all five coins on Resort Island.

Play as robot form character
Get the five Sonic coins in the following levels:

Metal Sonic: Resort Island
Metal Tails: Radical City
Metal Knucles: Reactive Factory
Metal Robotnik: Any level with Robotnik
Course close-up:
Press Up and Down to zoom in and out at the course selection screen.

Skip credits
Hold [Action] + [Accelerate] + [Change View] and press [Start].

View demo
Press [Action] + [Accelerate] to view the demo, or bypass the Sega and "Traveler's Tales" screens.

Slow characters down
Go to the options menu and select "Controls". Set them to whatever you are comfortable with, then when you get down to "Drift", set X for left and V for right. Then when you want to slow a character down, Amy works well, go to their side and drift into them. It will slow them down considerably. They will be left in the back to accelerate again while you are hurrying past him/her.

Purple Chaos Emerald without opening the gate
With Sonic (requires double jump), Mecha Sonic, and perhaps Mecha Knux, go to location where you would normally get the Purple Chaos Emerald. Do not open the door. Instead, pass it. When you reach the 90 degree right turn, make a 90 degree left turn instead. You will see a road. Jump up there and you will see the Purple Chaos Emerald.