There is a special testfire demo available via the Wii U Eshop, and it'll give you access to the multiplayer of Splatoon this weekend. The demo unlocks tomorrow (Saturday) for three play sessions at 4am, Midday and 8pm - all for one hour each. If you want try out the game you have up to three hours to play 4 vs 4 and paint the map your colour. Also, everyone who downloads the demo gets 10% off the price in Eshop if they buy the game between May 29 and June 4.