jul 17, 2017 - Epic Games releases Fortnite: Save the World
In July of 2017, Fortnite released their cooperate, player vs environment game Fortnite: Save the World as a paid-for early access game. Twitch streamers had early access to the title and it was clear that it was a hit with players. However, Epic Games had a greater idea with what they could create using Fortnite's engine.
Added to timeline:
Timeline of Fortnite