Paradox boss Fredrik Wesker has reiterated Arrowhead Studios' promise that fixes are on the way to Magicka.
Speaking with ArsTechnica, Wesker said the development team is "working around the clock," and "will get this fixed."
"We will make this right," he said and also explained what happened at bit.
"We ran the game through two rounds of external QA, one of them dedicated to co-op multiplayer, including hot seat, LAN, and over the Internet. We got a lot of good feedback from the QA team on all forms of co-op. I want to make it perfectly clear: it's obvious not enough was done to fix the online multiplayer part, as it turns out.
"With that advance knowledge, we would have held the release a few weeks to test and fix the connectivity under more realistic circumstances to avoid the situation where people cannot connect properly to games online, instead of being limited to hot seat and LAN to enjoy Magicka."
The first patch for the game was released on launch day.