Anyone familiar with a Bethesda RPG knows a player can spend hundreds of hours exploring without completing a single story quest. With that said, Fallout 4 will likely be Bethesda’s most expansive game yet.

Fallout 4’s lead producer Jeff Gardiner said he is still finding new things to explore in the radiated wastelands of Boston. “I’ve played the game probably 400 hours, and I’m still finding stuff that I haven’t seen yet,” Gardiner said in an interview with GamesRadar.

Todd Howard, Fallout 4’s game director, added, “I’ll be playing the game and run into something and be like, ‘Who built this? What is this? It’s so big!’”

Among the new additions to Fallout is the ability to build houses; however, they won’t have any real purpose to the main storyline. Another welcome add-on is your indestructible canine companion, Dogmeat, will never surrender himself to the afterlife.

Fallout 4 releases November 10. To learn more details about the new title, take a look at our E3 coverage and check out our primer to brush up on your Fallout history.