9pm for definite but I could be earlier. Don’t forget to get through the tutorial first.
Couple of tips.
1: Glow sticks are your friend ( O button). They’re on a relatively slow recharge but you have a full stock of four of them I think (I could swear it used to be three), so use them freely.
2: there is no aim down sights here. Left trigger is your pick axe so try not to accidentally mine the bad guys. Although the pickaxe will do some damage.