This is the typical Arcade Game lock for a Coin door. Most Arcade games use either a 5/8" or a 7/8" type lock or a combination of them.
What this tutorial is going to show you how to do is remove the tumbler pins from a lock in order for a given key to work with it.
This should work for most of your locks, however, the trick is going to find a key that will fit in all of your locks. This could be a problem for some people. If that is the case, you might need two more more keys. The idea here though is to make all those locks without keys useful once again!
First off, I am not a Locksmith. The terms that I use are what I remember them being called way back when. If my terminology is wrong, please let me know what is wrong and how to fix it and I will update it. For the most part even if it is wrong you should get the general idea of what needs to be done.
Now some may argue that this is not really "Keying Alike" and they would be correct. What this is doing, though, is allowing you to use the same key for all your locks. This gets us the same results in the end, which is to use one key for all the locks.
Another thing to note is that these locks will become very insecure, however, for most collectors, this is not a problem since we really aren't trying to keep anyone out of the games, but rather it makes the game more complete.
If you wish to actually Key the locks all the same, it would require you to get the correct tumblers that match the key you are keying to. For me, this is more of pain then it needs to be since I already have a bunch of locks and would rather not spend the $2 - $6 a lock per game.