Grappling with Grabbers is the fourth Challenge Act of Chemical Plant Act 2 in the console/PC version of Sonic Generations. It is unlocked after clearing every Stage in the classic era and is playable only as Modern Sonic.
This Challenge Act takes place in a slightly modified version of Chemical Plant Act 2. The Act's objective is to reach the Goal Ring at the end of the course while avoiding Grabber enemies. Much like the Eggrobo Rush, this challenge fills the stage up with more than the usual number of enemies. While they do not provide much of a threat, their main purpose is to grab and hinder the player's progress so that they do not make it to the goal within the given time limit.
The player begins just after where the skydiving section would be in the normal version of the Act. They must progress through the stage mostly as normal, stopping to jump across platforms while avoiding the many Grabbers that populate the Act. After a quick waterslide, the player will be launched into one final platforming section, and the Goal Ring can be found up above at the end of it.