No date announced yet. Check out more in the Crunchyroll article as they are co-producing along with Aniplex. Series synopsis from AniList:
Back then, Dok-Ja had no idea. He had no idea his favorite web novel ‘Three Ways to Survive the Apocalypse’ was going to come to life, and that he would become the only person to know how the world was going to end. He also had no idea he would end up becoming the protagonist of this novel-turned-reality. Now, Dok-Ja will go on a journey to change the course of the story and save humankind once and for all.
The adaptation that everybody knew was going to come at some point. ORV is one of the few manhwa I have read regularly in the past and it is pretty good. I remember getting caught up to what was current at the time and then stopping; planning to let the chapters build up again and binge once more. If you are completely unfamiliar, then Gigguk recently did a video on the series to provide some more insight.