Destructoid: "The Showdown Effect's success will ultimately be dictated by the number of players that stick around. They need to host the games, and they need to provide the challenge for other players. Unlike Magicka, it's a multiplayer, online-only experience, and that's something of a risky endeavor for a small studio.
It's a game that deserves to be played, however, and it's one that's a hilarious spectacle to watch too -- something that Arrowhead clearly realizes and is keen to exploit with its Twitch.tv integration. Maybe I should make one of those video thingymabobs? Nah, I don't need any more people laughing at how awful I am." 8.5/10