Get the cake ready, Portal turns 10

With the motivational promise of a cake-based reward, and a run of increasingly tricky puzzle rooms that carefully introduced new concepts in an open-ended arena, Portal became an instant and lasting hit.

October 10, 2017 marks the ten-year anniversary of Portal, a first-person puzzle game that brought new levels of humour, problem solving, and meme-ready one liners to the video game space. 

Such was the impact of Portal that it's remained a high water mark in 3D puzzle games since a 2007 debut.