GameCoder studios announces Attractio, a first-person shooter/puzzle game that looks more than a little inspired by Valve's Portal series. This teaser trailer offers a look at the game, which is due this summer for Windows. Linux, and OS X. There is also a playable demo, which is available on this page in exchange for filling out survey. Here's word on the game:

Attractio is a FPS/Puzzle videogame where the players solve deathly and tricky puzzles manipulating the gravity at will. This game offers puzzles that challenge your nerves and your survival ability, customized advanced and a lot of stunning action.

The player will be able to play three parallel character story lines where, helped with technology like Attractio Gravity Boots and the Attractio Gravity Gun they may be able to achieve their most valuable and mysterious interests.