It has been revealed that the PSN version of Trine will be available for download for $20, while the PC version of the game will cost $30, and is expected as a July release.

Frozenbyte, Trine developer:

“Trine is far from a game created by a solo hero developer (we have over 20 employees and Trine has contributions from a double amount of people) … we are very confident that we can deliver a full retail experience with Trine.”

Source