ULTRAKILL is a fast-paced first-person shooter where players plunge into frenzied battles in the depths of Hell as the V1 fighting machine. Possessing a flexible movement system, healing mechanism with enemy health and creative fighting style, the game brings a rare sense of excitement that even many modern FPSs can't match.
The opening of this game is not a story of humanity's salvation. Humanity has... died. You are V1, a pure machine designed for combat and blood for fuel. Running out of people to "suck", V1 decided to break through the gates of hell and go down there to find a group of demons to... have afternoon tea.
The plot seems simple, but the setting is extremely unique. The entire ULTRAKILL takes place in the levels of Dante's hell, from the gates of Hell all the way to level 9 - Treachery. What's interesting is that the developers (a man named Hakita) don't tell the story through lengthy cutscene, but through how Hell itself operates and the lines of Testament found in secret rooms. It creates a vague, mysterious and extremely attractive feeling.

Ignore everything you know about cover, reloading or tactics. In ULTRAKILL, there is only one unwritten rule: Living slowly is dying early.
There are no first aid kits or medicine here. Your health bar only fills up when enemy blood hits you. That means you have to rush into the place with the most crowds of demons, shoot them to pieces to suck their blood.
You do not need to level up or choose skills. The only difference between a new player and a seasoned ULTRAKILL gamer is pure gaming skill.
ULTRAKILL's arsenal has no such thing as "the most powerful gun". It only has the "sickest combinations".
In addition to the basic Revolver and Shotgun, you will have Nailgun (nail gun), Railcannon (electromagnetic gun), and Rocket Launcher. But the good thing is Alternate Fire (second firing mode).
Fires a coin. If you hit that coin, the bullet will bounce off and kill the demon hiding behind the corner of the wall. This feeling of "shooting ping pong" feels extremely good.
This is the strongest "weapon" in the game. You can punch back lasers, punch back enemy grenades. It means the demon launches a missile at you, you punch it, the missile flies back and explodes in its mouth. Truly unparalleled tyranny!
Fires a drill that sticks into the enemy's body, sucking blood back to you. This is the ultimate "brain hack" of the shooting game genre, turning an electromagnetic gun into... a blood-suction tube.
You can play ULTRAKILL unblocked directly in your browser at https://undeadcorridor.io/ without downloading or complicated installation. This is a convenient way to experience the high-speed gunplay, innovative combo system and breathtaking battles that ULTRAKILL is famous for.
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