If you're looking for anime similar to Duds Hunt, you might like these titles.
The story follows a group of three friends who suddenly awaken in a completely different alternate world. At first they think it's all a dream or a joke, but they soon realize that the only way to survive in this world is to participate and win deadly survival games.
Kiri has been obsessed with cutting others' hair since he was a child, to the extent that he always carries a pair of shears with him wherever he goes. So when the boy accidentally meets Iwai, a young girl with floor-length hair, he's crushed to learn that due to a curse, her locks cannot be shorn by ordinary means. And what's more, she's an unwilling participant in a deadly game where psychotic wielders of powerful "Killing Goods" do their best to take her life in exchange for a prize beyond imagination. Wielding the shears he learns are his own Killing Good, Kiri must now keep Iwai safe from those who wish to murder her and help her survive this sinister game.
An unpredictable battle of superpowers. Kaname Sudo, an ordinary high school student, receives an invitation email to try a mysterious app called "Darwin's Game." Kaname, upon launching the app, is drawn into a game where players fight one another using superpowers called Sigils. Without knowing the reason for all this, can Kaname survive furious battles against the powerful players who attack him?
Fame. Glory. Power. Anything in your wildest dreams is possible when you reach the top of the Tower of God. Those lucky enough to be chosen by the tower ascend each floor in hopes of fulfilling their dreams, but to succeed, they must complete dangerous and deadly tests along the way. But there are others who can enter the structure on their own free will; these "irregulars" are feared by many and are said to leave chaos and change in their wake. Twenty-Fifth Baam is one such irregular who begins to climb the Tower of God in hopes of reuniting with his childhood friend Rachel, but as he soon discovers, this perilous path will put him in the crosshairs of fierce competitors, untrustworthy rivals and terrifying monsters, and he might not make it out alive...