The Magicka series of action-adventure games with zany wizards and silly humor has just hit the PlayStation 4 with Magicka 2 (read the GamesBeat review), which released Tuesday. It’s a co-op game, and as I discovered last night, it’s not exactly intuitive to add-in a second player when playing on the same system.
I reached out to publisher Paradox Interactive earlier today to figure this out, and a spokesperson helped clear up the process. To add other players for local co-op, follow these directions:

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