Objective: Reach the Goal Post.

Recommended Character: Knuckles (for hidden paths) or Amy (for combat).
Walkthrough:
- Act 2 introduces more verticality and environmental hazards. Begin by boosting through the initial straightaway.
- You'll soon encounter crumbling platforms. Move quickly across them to avoid falling.
- Chaos Emerald Opportunity: After a section with multiple springs leading upwards, look for a hidden path to the left, often behind a destructible wall or a series of small platforms. Knuckles can easily glide to this area. The Big Ring will be there.
- Navigate through a series of underwater sections. While underwater, your movement is slower, and you'll need to find air bubbles to avoid drowning.
- There are more Buzz Bombers and Crabmeats, sometimes in greater numbers. Amy's Hammer Attack can be useful here for clearing groups.
- The final stretch involves a long grind rail section followed by a series of springs leading to the Goal Post.
Tips: With Knuckles, try climbing walls to find alternative routes and shortcuts. Amy's double jump can help with precise platforming over crumbling sections.