How to open the forcefield in green hill zone in Chapter 4
Go in central city then go into the empty workshop. This time it won't be empty. Talk to the man in the corner of the workshop. After you receive the mission, Go to greenhill zone and to the saleman. He will give you the stapler. Go back to central city and talk to the worker. Then he will give you the very last eggman device. Go to the forcefield and open it.
Hope you have fun.
Added by: Drainager Aug 21st 2009, ID#12325