For laughs of course, what might someone get slapped with if they did a closet raid with a thumb drive for that stuff. Wouldn't it just be a DB dump? Schema and data?
Federal pound me in the ass
prison? Pick up trash with Chris Brown?
I really don't know. That's actually kind of terrifying to think about, honestly - just having someone break into a server closet somewhere and take the server and code, with no accountability on who did it and where it ended up. These places don't normally have security at all during the night, and if you don't harm anyone on tresspassing and cover your tracks, there's only security footage and it's akin to someone robbing a convenience store in terms of tracking the person.
If you do end up getting caught, I mean, you'd be charged with grand larceny if you don't return it in the same day. If you make a copy and then return the property intact? I don't actually think that's anything other that a misdemeanor, they'd have a long legal battle to prove its worth and even harder that you used that information to defraud them. If you operate a non-profit emulation project, you couldn't prove with intent to defraud either.
If you access the computer, that's its own rules in the CFAA. You might be hit under the unauthorized access to a machine provision of the CFAA, and it depends on how valuable Daybreak or its parent companies value the game.
EQ, for example, is a $40 million USD IP. You could argue that accessing the game's source code would be a offense level 22 violation because that's the statue for the IP itself.
With vanguard, It's also going to be hard for the company to prove the IP's worth, given it's not currently in use in a product, and is pining for the fjords in a closet somewhere.
Definitely a felony if it's across state lines, so larceny would have to be in state, but you'd have to check California state code for trespassing guidelines, and also the CFAA could upgrade your actions to a felony if value is proven.
Why the fuck are you considering this again?