I really want to do this with a game, but so far from googling and everything. I have not found a single way to delete ONE games save data. Does anyone know? I'm pretty sure there's a way.
Tell us the game. And I might as well give you some instructions. Flash stores its data in a directory which is normally hidden. Anyway, enter the address below on your computer.
C:\\Documents and Settings\\XXXX\\Application Data\\Macromedia\\Flash Player\\#SharedObjects
Replace the XXXX's with your profile's username. You'll then see a strangely named folder, or maybe two. Go through all of them and find the folder entitled armorgames.com. Enter it and you should see some sub-folders, enter them and eventually you'll find folders named after games whose data has been stored. Find the folder of the game you desire, and delete it. Done.
To lazy to hack these days. There are two ways to hack, the first being Cheat Engine and the second being .sol file modification. I used to hack only with the second.