Chaper 1: New Land
Bash would normally send him stumbling a couple of meters, but since he was already crouching I'm going to rule that this knocks him flat on the ground instead. Which is still pretty good for you, and not so good for him, so...
The first apeman, not relishing his disadvantageous position, quickly tries to push himself back up onto his feet. His wounds have not yet reached the point of interfering with this kind of movement, but having two attackers hovering over him certainly does. He is able to power through, pushing both of you back a little bit, coming to his feet with an angry screech.
And then Barnutan swings his club again. It's a good shot, lined up straight for the crown of the apeman's skull. But the apeman moves quickly now that he's got his bearings. He tries to sidestep and slap Barnutan's arm to the side. The maneuver does take some of the power out of Barnutan's attack, but not enough. It's still another hit to the apeman's already bruised head, and it immediately puts him back on the ground, still breathing but completely insensate.
Standing up while engaged in melee requires an opposed roll of Brawn or Athletics, so:
GM rolled 38,10,62 using d100,d100,d100. apeman 46% vs B 72%, M 48%
-apeman and Barnutan both got regular successes, but the apeman rolled higher so he wins
GM, for the NPC apeman, rolled 58 using 1d100. parry.
-that's a success. Human-sized hands count as Small weapons, whereas Barnutan's club is a Medium weapon; the difference in size category means that Barnutan's damage roll is halved (rounding up), and since both combatants rolled a regular success there are no special effects.
I've lost track of whether or not you already rolled hit location for this attack, but whatever, I'll let it slide this time around. Let's call it a head shot and move on. And that means he's down to 0 hp in the head, which is a Serious Wound, so...
GM, for the NPC apeman, rolled 90 using 1d100. Endurance 62 vs head injury.
-and that's the end of that.
'Sandra's shot seems to have little effect; the bolt doesn't even stick into the bastard, it just hangs there for a moment and then falls out, like it barely penetrated the skin. The only thing it actually achieves is confirming your presence. The apeman responds by ducking around the nearest tree.
Your turn. You will need to spend your full action moving to get to the tree where the apeman is hiding, if that's what you want to do. You can choose whether you end your move on the same side of the tree as the apeman, with both of you facing each other, or if you want to end on a different side, with the tree partially or completely blocking you. If you want to stop with the tree providing cover, it will provide the same amount of cover for both you and the apeman.