Star Citizen Online: Isekai Edition - Chapter 12: Imperial Citizen

Forge unparalleled mechs with the ambition of old age, and use the galaxy as a knife to smash the edge of the empire.

His name is Ji Xinghe. When he was 65 years old, he went to Alien Battlefield to avenge his son.

The old man is standing on the ground, his ambition is a thousand miles away, the old man wears armor, and fights to the galaxy, the old man drags his sword, it is not for glory.

- Description from novelbuddy

Zhou Qi was reborn countless times before the end.

Every time, it doesn’t end well.

Monster invasion, natural disaster baptism, twisted rules, world destruction…

He is familiar with the survival laws of all environments, he is the doomsday walker, the lonely savior.

However, it is also a poor worm trapped in place.

What is the truth of the end? Are human struggles really meaningless? What does his existence mean?

… Zhou Qi thought about these questions and woke up again from his dream.

When the strangeness came, he made all preparations numbly.

but–

The end did not come this time.

- Description from novelbuddy

When Simon dies, it turns out there's more to combat than lightning reflexes with his controller, and the path to becoming a hero is more brutal than he can imagine as he descends into The Pit. Death after Death is a dark, time loop/Isesaki story with roguelike elements, that explores some of the common tropes in a different light.

Jacob Steve, an Old Man, died at 116 after living a whole life.

But Jacob always had a dark side, which he always suppressed and hid from others.
However, in the later years of his life, when death was inevitable, he understood there wasn't any point in having wealth, knowledge, or desires if you couldn't have a life to enjoy them.

He became obsessed with fabled immortality and devoted his reaming life to extending his fleeting lifespan, but just like any other failed.

However, he mysteriously got another chance at life and found a way that led to fabled immortality.
But he was also forewarned that the way led to it was filled with blood and darkness!

In the end, Jacob chose it anyway with no way of going back, and it was also the start of his suffering and his icky, brutal journey toward the 'Immortality' he wanted so badly!