скажите плиз. полную дату создания Valve (число месяц год)

When you give smart talented people the freedom to create without fear of failure, amazing things happen. We see it every day at Valve. In fact, some of our best insights have come from our biggest mistakes. And we’re ok with that! Since 1996, this approach has produced award-winning games, leading-edge technologies, and a groundbreaking social entertainment platform. We’re always looking for creative risk-takers who can keep that streak alive.

На официальном сайте и ввике нету полной даты. Лишь 1996 год.