Judge Dredd
Bally, 1993So I got a new game in recently. The key was supposed to be in the cabinet somewhere. We haven't been able to find it. It apparently fell off the hook during shipment. We can't unlock the back box. It was suggested we use a screw driver. But want that essentially destroy the lock and potentially do other damage? Any ideas on how to get it open?
It's a Judge Dredd.
Depending on game, you can use the screwdriver to move the mechanism holding the glass in by pushing it in from above the glass.
Make sure the spare key isn't screwed inside the cabinet.
Pick the lock.
Many will tell you to just drill it out.
Yeah, name will help.
Some games, have this intricate locking mechanisms and if you drill out the lock and the cam falls off, your stuck.
Some games its a case of simply removing the 2 torx security screws.
Some games you can remove the vent panel on the back of the head.
Best thing is to learn how to pick a pinball lock 
If it's a modern DMD game you can remove the security torx screws holding the whole lock assembly.
If you have to drill the lock, start with a very small bit and move up one size at a time until you can twist it with a screwdriver.
Sometimes the whole lock can be twisted with a screwdriver enough to release.
Quoted from pinwiztom:I got one of those coffee cans too, but it is always the last key you try before you get it opened.
Hahaha I thought I was the only one with that coffee can.
I agree with these suggestions. Before you go the drill route, just try a screwdriver. You can put a flathead in the keyhole and wiggle it back and forth. If you stick with it for 10 minutes or so it should loosen up. I've had that work on older games at least. Unless you're routing it, you probably won't even need a new lock for it. If that fails, then look up how to drill out a lock on youtube.
Quoted from pinwiztom:I got one of those coffee cans too, but it is always the last key you try before you get it opened.
That's because you stop trying after you open it lol.
As strange as this sounds, and it's not for the faint of heart or novice, but I have with some Wms game (early 80s) lifted up on the bg channel and with a dead blow hammer hit the top of the cabinet! Some way some how this worked. Did it more than once and didn't break a bg. Lucky I know.
Quoted from pinwhoo:...with a dead blow hammer hit the top of the cabinet! Some way some how this worked. Did it more than once and didn't break a bg. Lucky I know.
I must confess, Pinwhoo, I don't have a dead blow hammer in my pinball toolbox...
Quoted from cody_chunn:If it's a modern DMD game you can remove the security torx screws holding the whole lock assembly.
If you have to drill the lock, start with a very small bit and move up one size at a time until you can twist it with a screwdriver.
Sometimes the whole lock can be twisted with a screwdriver enough to release.
This -
If it's a DMD game, just remove the whole lock assembly. Really easy. Especially if you already have the Torx bits. (Which.. IMHO, everyone should..!) 
Quoted from MrArt2u:Which game? Some are easier to access than others.
It's a Bally Judge Dredd.
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