It's a standard quandary of modern role playing games.
You've been running around for what feels like hours trying to find that door, scrambling over rocks and round ruins before you finally stumble across the blessed thing. You approach, victorious, salivating over the stash that no-doubt awaits inside as you hammer away on "X to open". But the door won't budge. You haven't got the key.
The internet has come to the aid of many modern gamers in such a position, with fans filling forums detailing how to find that thing you really need or hunt down that weapon you've always wanted - but these tips often fall short of giving you a real handle on what's going on: "Go here, press that, pick this up, run back", often misspelt or just plain confusing.
Which is why Bethesda is coming to the aid of Fallout 4 players early. Rather than having them dig around the web for that tip that's going to save them many futile deaths, they've teamed up with strategy guide maker Prima Games to make an official help manual, the Vault Dweller's Survival Guide.
Running to some 400 pages of maps, stats, and tips, the guide hints at just how huge Fallout 4 is going to be.
A digital version of the guide will be available for £7.08, while a paperback will cost $29.99 (£19.23), both available on 10 November when the game arrives.
And no, they won't be accepting bottle caps.