Wolfenstein: The New Order

- It's literally impossible to miss anything. Collectables carry over, and while the game branches at the end of the first chapter, you can go to chapter select at any time and swap between the timelines if you want.

- If you're having trouble with a perk, don't sweat it. They're not massive changes to the gameplay, and usually an opportunity to unlock it will show up after you've stopped trying to force it.

- Make sure you sleep at the bed on the top floor of the hideout.

- The only real difference is whether you get a bonus to health or a bonus to armor based off a choice at the end of the Prologue. Choose Fergus rather than Wyatt, because you'll get a better side-character later.