The Buzz Bombers' Revenge! is the second Challenge Act of Green Hill Act 1 in the console/PC version of Sonic Generations. It is unlocked after clearing every Stage in the classic era and is playable only as Classic Sonic.
In this Challenge Act, the player must traverse an altered version of the first half of Green Hill Act 1 in under a minute. However, hordes of Buzz Bombers and Buzzer Badniks are ubiquitous, presenting the player with an extra challenge. Some of the Badniks can be used to reach and collect clocks that can remove a few seconds from the player's overall time. Upon passing the Goal Plate, the player is ranked according to their clear time. If the player manages to make it to the Goal Plate through the Challenge Act in under a minute, they will be awarded an "S" rank.
The player begins just after the beginning of the normal version of Act 1. They must continue traveling to the right, using platforms and the Badniks to take higher pathways in order to progress through the stage quickly. It is very similar to the normal version of the Act, although there are additional barriers placed throughout the stage, limiting the pathways the player is able to take.
- Despite the Challenge Act title clearly stating that Buzz Bombers play a role in the Challenge Act, Buzzer Badniks actually appear. In fact, the first Badnik Classic Sonic encounters in the Challenge Act is a Buzzer Badnik.