Portal 2: celebrating 10 years without a sequel

This year, Portal 2 celebrated its 10 year anniversary. It's a milestone that, despite the game's renown, has hardly been marked with the unbridled

Portal 2 Gets Valve-Approved Fan-Made Prequel

Portal 2 was originally a game without portals - Gematsu

Portal 2: celebrating 10 years without a sequel

Happy ten-year anniversary, Portal 2 – Destructoid

A Portal 2 10th Anniversary Animation

Portal 2: celebrating 10 years without a sequel

Happy ten-year anniversary, Portal 2 – Destructoid

Today is Portal 2's 10th anniversary. : r/Games

Portal 2: celebrating 10 years without a sequel

Portal 2 Now Available for Mac - MacRumors

Portal 2 Splitscreen and Online Co-Op Detailed.