A playable demo is now available for Trine, Frozenbyte's upcoming fantasy-themed action/platformer, so if you're not tryin' Trine, then you're not trying. The demo features the ability to play the tutorial and the game's first-level as any of Trine's three playable characters. The 461 MB download can be found on AtomicGamer, ComputerGames.ro, FileFront, and Gamer's Hell. Those sites are reporting a July 3 release date for Trine, which is presumably in Europe, as SouthPeak Interactive announced today it has signed on as the game's North American publisher, setting the game's release as the more general "Summer 2009." Here's a bit of the game's description:

In Trine™, players work together to create and use objects to solve challenging physics-based puzzles and defeat dangerous enemies. Set in a kingdom on the verge of chaos, a warrior, a wizard, and a thief are bound by a powerful artifact known as "the Trine". Together, they must battle the forces of space, energy, and motion to put an end to the reign of the dark sorcerer that rules the kingdom.

Featuring three-player cooperative play, each character has specific talents to invent new solutions to puzzles and original ways to defeat enemies. The Wizard can use magic to create objects and new paths, the Thief can use her agility and accuracy to quickly deal with enemies, and the Warrior unleashes pure destruction everywhere he travels.