Company: Sony Computer Entertainment

In October 2001, Sony Computer Entertainment purchased an 18.6% stake in the financially struggling Squaresoft after they requested a capital injection from Sony. After the 2003 Square Enix merger, this stake eventually decreased to 8.25% by 2012. Sony later sold off all of its Square Enix shares in April 2014.

In 2015, Sony Computer Entertainment of America attempted to trademark the term "Let's Play" with the United States Patent and Trademark Office, however it was rejected by the Office because it was deemed "confusingly similar" to another trademark held by Let'z Play of America, a company based in Georgia that organizes and connects video gamers with online and offline events, which has held the trademark since 2013.

SEGA was the second company (after Nintendo) to be in negotiation with Sony to make a new console, but the idea was eventually rejected by SEGA. It was confirmed by Tom Kalinske (an employee of SEGA) that the console specs SEGA had proposed were used for the PlayStation. It was also the technical achievements of SEGA's "Virtua Fighter" that made Sony focus on 3D rather than 2D. SEGA essentially sealed their own fate in the console market by rejecting the plans and inspiring Sony to focus on 3D.