Steam now offers a playable demo for The Showdown Effect, offering the chance to sample the just released multiplayer action/platformer from Arrowhead Game Studios. The demo grants access to the game's single-player training stage to check out gameplay, though it does not allow multiplayer play. For those interested in that, the livestream scheduled at 2:00 pm EST today on Twitch will show off the game's multiplayer action, and will include participants from Arrowhead and Paradox Interactive.