Drakengard 3: you feel trapped, unable to choose, the pain won't shut up, all you want is for everything to go away, yet you still choose the longer road despite all your exhaustion and how meaningless it all may be

Drakengard: no matter what path you go, it all ends in disaster, everything is destined to end, all you can do is choose whether you'll resist and fight to the end, or give up and die with an even greater sense that it was all worthless

NieR: we live, and we fight for what we believe is right, we may do horrible things for what we believe in, but as long as we have something to fight for, right and wrong do not matter

NieR Automata: hold on to the things that help you through this road, as simple as they may be