If you're looking for manga similar to The First Hunter, you might like these titles.
Jungwoo Min has a special ability, one that lets him see when a path leads to a misfortune, or disaster. He uses his "Eyes of Misfortune” to spot these unfortunate events and stop them. Disguising himself as a terrorist, he begins using his power to save people from certain danger. This leads him to become feared by the people he is looking to save. Soon he discovers that the more he saves others, the unhappier he becomes. Thus unfolds the story of a hero and his struggle between happiness and despair. And the unfortunate reality of saving the world, even while becoming a supposed terrorist...or TERROR MAN.
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Zuo Tianchen is the last living human in a mutated zombie-infested city. Just when he was sure he'd died, he finds his soul returned to just before that ill-fated day ten years ago. He swears he'll protect the people important to him this time round and reunite with his past lover. Watch his struggles to survive equipped with his memory of the next ten years!
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Taekwon fights to become the best in RAC but is sucked into another world... This is a story of his path to becoming the greatest.
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There are attacks everyday and people suddenly changed into Deman. But I... should look for my sister; also, the Gods are here to help humans to prevent the attacks.
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After being caught in an explosion caused by a meteor collision, Red wakes up to find that everything has changed.
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The world ended... three years ago! After I met my death... when I opened my eyes again... I found myself 6 months before the zombie apocalypse began!
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What started out as an ordinary day turned upside down when an unknown catastrophe struck Earth, transporting Suho Park to a different planet. He eventually learns how to adapt and fight for his survival in this foreign world, but one day, just as suddenly as he was sucked into this new planet, Suho is pulled back to Earth. He quickly learns that return to life as he remembers it is no longer possible, as Earth is in constant battle with monsters who’ve managed to infiltrate the planet. How will Suho fight against the monsters attacking Earth, and will he be able to survive this time with his current skills?
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Both have fighting Hunters/Awakeners with worldwide increasing dungeon difficulty with one overpowered MC.
E-class hunter Jinwoo Sung is the weakest of them all. Looked down on by everyone, he has no money, no abilities to speak of, and no other job prospects. So when his party finds a hidden dungeon, he's determined to use this chance to change his life for the better... but the opportunity he finds is a bit different from what he had in mind!
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Similar vibes in the smartness and grittiness even though the art style is really different.
The hype all the way though is also great and you enjoy watch both of them get stronger as the story progresses.