You need to go slightly down the ramp so that Sonic can Boost to reach the platform with the ring on it. Ring Four: You will then want to use a set of pinball bumpers to your right to help you get back up to the upper level, where you'll find a ramp.If you drop down to this tunnel and speed along, you should hit another booster which will send you to the right and up a ramp where you can collect this Red Star Ring. Ring Three: Towards the end of the stage, if you fall past some bumpers, you will hit an additional set of pinball bumpers, which will lead to a tunnel below.Ring Two: Hit the checkpoint then re-use the pinball bumper to boost you up the the higher levels, where you'll find the second ring.If you use the pink one to push yourself towards the pinball bumper, you can then slowly drop down to get the ring.

There will be a pink bumper and pinball bumper.

Ring One: Following the natural path, you should spot a gap between one platform and another.

Stage Thirteen: Mystic Jungle Casino Forest

Ring Five: You will then need to grapple upwards, and after passing through some rings, you can collect the final Red Star Ring for this stage.

After hitting all the enemies, you will go through an upside-down loop and you'll find the ring. Shortly after, you'll see a spiral rail that will take you to the bottom level.

Ring Four: There will be more grapple points that will send you upwards to start with, but then you will need to start grappling down.

Ring Three: After collecting the second ring, if you continue to the right, you should be shot upwards onto a path that will allow you to grab the third ring.

You will have to jump a gap to reach the platform it is sitting on. Once they are defeated, make your way to the left and you'll find the second ring hidden over there. Using the last one you to drop down, you will be confronted by a line of enemies to the right.

Ring Two: After following the natural path you will see plenty of grapple points.

After you have done this continue up the path and you’ll be able to grab the first Red Star Ring. Once you have defeated the enemies there will be a capsule that you will need to grab.

Ring One: You will come to a circular area with enemies lined up around the circle.

This is another boss battle so there are no Red Star Rings to collect in this area.

Sonic generations red ring guide