[GameBoy]

Anyone know what size screwdriver I need to remove this backplate?

 

[TheJesus]

Very, very, very tiny, lol.

It would be in one of those "Glasses Repair Kits". Take it to a local hardware shop and ask them what size it is, that's what I do if my plethora of screwdrivers fail me.

 

[AMOCO]

Just get a set of screwdrivers like this:
http://www.harborfreight.com/hand-tools/screwdrivers/6-piece-precision-screwdriver-set-47823.html

I use these:
http://www.canadiantire.ca/AST/browse/6/Tools/HandTools/ScrewdriverSets/PRDOVR~0573505P/Mastercraft+6-Piece+Precision+Screwdriver+Set.jsp?locale=en