Triple Boost (トリプルブースト Toripurubūsuto?) is a move that appears in Sonic Forces. It is a variation of the Double Boost and a collaboration technique between Modern Sonic, Classic Sonic, and the Avatar.
Description
When performing the Triple Boost, Modern Sonic, Classic Sonic, and the Avatar jump up side-by-side while boosting forward simultaneously. They then spin together in a clockwise motion. After building up momentum, they shoot themselves forward as a combined projectile with enough force to penetrate extremely tough robot armor.
In gameplay, the Triple Boost can only be performed during the final phase of the battle with the Death Egg Robot. When the Death Egg Robot has lost nearly all its health, the Triple Boost will be initiated automatically. The player is then prompted to repeatedly press 
/
(Default on PC)/
/[Shift] in the time allotted to generate the power needed to blast forward and shoot straight through the Death Egg Robot's head. After that, the boss battle will be completed. Failure to do so will stop the attack and the player will have to boost through it and try again.
Trivia
- If the player decides to fail the Triple Boost, the Death Egg Robot will not attack them.
- This technique marks the first time Classic Sonic has performed a successful Boost.
