The development of Portal 1 and 2 was a rollercoaster ride of ups and downs, much like the physics-defying gameplay they would eventually offer. The concept of Portal was initially developed by a team of students from DigiPen Institute of Technology, who were hired by Valve after the demo of their game Narbacular Drop caught the attention of the company's employees. Valve then tasked the team with expanding the concept into a full game, resulting in the creation of Portal.

The success of Portal led to the development of Portal 2, which was initially intended to be a DLC for the first game. However, the scope of the project grew so large that it eventually became a standalone game. Valve faced a number of challenges during the development of Portal 2, including delays and issues with the game's co-op mode. Despite these challenges, the game was released to critical acclaim and has since become a cult classic, with fans eagerly awaiting any news of a possible third installment.
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