Publisher Headup and developer ClockStone Software have released new add-on content for Bridge Constructor Portal.
Dubbed Portal Proficiency, the add-on takes players back to the Aperture Science Enrichment Center to face 30 new test chambers each featuring mind-bending construction puzzles. Or if the 30 challenging brain teasers aren’t enough, you can create your own.
Players can now selectively place portals just like in the original games in the Portal series. The DLC is available for $5,99/€5.99/£4.99.