The Boost is Sonic's signature move in Unleashed, and mastering its use is paramount for high-level play. It's not just for going fast; it's a versatile tool.

- Maintain Momentum: Use Boost to quickly accelerate out of turns, over small gaps, and through enemies to keep your speed up.
- Destroy Obstacles: The Boost can destroy many minor obstacles and weaker enemies, clearing your path without losing momentum.
- Fill the Gauge: Collect rings, perform tricks (wiggling the left stick in the air), and defeat enemies to refill your Boost Gauge. Always be looking for opportunities to do so.
- Strategic Boosting: Don't just hold the Boost button down. Use short bursts to navigate tricky sections, or save a full gauge for long straightaways or boss weak points.
- Quick Step Integration: Combine Boost with Quick Step to rapidly change lanes while maintaining high speed, essential for dodging hazards.
- Light Speed Dash Combo: After a Light Speed Dash, immediately activate Boost to carry that momentum forward.
Practice makes perfect. The more you play Sonic stages, the more intuitive your Boost usage will become, leading to faster times and higher scores.