Apocalypse: Mistaken for Prey, I Become the Ultimate Hunter

(Based on the Metal Max setting, though not entirely faithful, with original elements.)

(Not invincible + character growth + revenge + tanks + artillery + apocalypse + wasteland + no heroine + knife fights + decisive violence + self-interest + loosely adapted from the game)

This is a man's idea of romance.

Armor, shells, steel, treads, the setting sun over a nuclear wasteland, dried blood and bird droppings on tank armor, and the muscles, hormones, and adrenaline of a shirtless man driving his tank across the desert. Then there's Dr. Minqi's kindly, familiar reminder: “Go fetch the old man some fresh corpses!”

After transmigrating, Feng Xian defied his leader, and his entire family was slaughtered before his eyes. While fleeing, he was attacked by a monster and rescued on the brink of death.

Fortunately, a kind stranger came to his aid, and Feng Xian's body fused with the monster's.

Burning with rage, Feng Xian grows stronger and stronger across the wasteland, until he becomes the greatest hunter and sets out on the road to revenge.