Aperture Tag: The Paint Gun Testing Initiative is Now Available on Steam and is 30% off!*

Aperture Tag: The Paint Gun Testing Initiative is a Portal 2 Mod. It’s time to think with Gels! The Portal-Gun is gone, but the testing must go on! Grab the Paint-Gun Device and solve brand new test chambers in ways you’ve never solved them before!

*Offer ends July 22 at 10AM Pacific Time