Mullet MadJack: How to Encounter V2 in Boss Rush – Full Guide

If you are hunting for “V2” in Mullet MadJack, here is the thing nobody tells you up front: it is not a new game version, a campaign chapter, or a patch label. V2 is Punished V2 from ULTRAKILL, and he is the final boss of Boss Rush Mode. You will never bump into him by replaying the story — you have to go to the right mode.

The short version

• What V2 is: Punished V2, the headline boss of the free MULLET MADJACK x ULTRAKILL crossover.
• Where to find him: he is the final boss of Boss Rush Mode — not in the story campaign.
• How to get there: the crossover arrived in a free update (December 19, 2024 on Steam). Update your game, then pick Boss Rush from the mode menu.
• What the fight is: it mirrors the second V2 fight from ULTRAKILL, with new attacks tuned for Mullet MadJack — an electric shockwave and explosives — set to ULTRAKILL’s “Duel” track.

What V2 actually is in Mullet MadJack

V2 is Punished V2, the supreme machine from ULTRAKILL, brought in as the centerpiece of the MULLET MADJACK x ULTRAKILL collaboration. He is the final boss of Boss Rush Mode — the last gate at the end of the gauntlet, not a random room encounter. This version is non-canon crossover content; it is not part of either game’s story.

The redesign makes it obvious you are facing a guest, not a reskin. Punished V2 has a battered, worn-out look — bandages wrapped around its torso and brand-new replacement limbs. The fight even reuses the song “Duel” pulled directly from ULTRAKILL’s own V2 encounter, so if you know that game, the audio cue alone tells you exactly who you are up against.

How to encounter V2

There is no secret floor and no hidden campaign route. The whole path is the mode menu:

• Update the game. The crossover shipped in the free December 19, 2024 update on Steam. If your build predates it, you will not see the content.
• Open the mode select and choose Boss Rush Mode. This is the mode that contains V2. Story and standard runs do not.
• Survive the boss gauntlet. Boss Rush throws a series of bosses at you back to back — the design is to run at them as fast as you can and stay alive, with faster clears scoring higher on the global rankings.
• V2 is the last one standing. Punished V2 sits at the end as the final boss, so you have to work through the run to reach him.

Mullet MadJack is on PC (Steam and GOG, May 15, 2024), Xbox One and Series X|S (March 13, 2025), and Nintendo Switch (April 30, 2026). If you are on a newer platform release, confirm your build actually carries the crossover update before assuming you missed an in-game secret — the fight lives in Boss Rush, not the campaign.

What the V2 fight is built around

The encounter is largely modeled on the second V2 fight from ULTRAKILL, then retuned for Mullet MadJack’s faster, timer-driven loop. Two attacks define the threat: an electric shockwave and explosives. Both reward distance management and clean movement over standing still and trading shots — V2 is fast enough to fight Jack on even footing, so flailing in place gets you punished.

Because it slots into Boss Rush, V2 is a pure execution test rather than a story beat. Mullet MadJack’s core loop — speed, aggression, and the constant pressure of the timer — is exactly what a boss like this exposes. You can muscle through normal rooms on momentum, but a final boss demands cleaner reads and fewer wasted decisions. For the deeper combat fundamentals that carry over here, see our best builds and loadouts for fast runs.

How to prepare for Punished V2

1. Treat the shockwave and explosives as spacing tells

V2’s two signature attacks — the electric shockwave and explosives — punish players who park themselves. Keep moving, watch the wind-ups, and use distance to take each hit on your terms instead of eating a combo because you stopped to shoot.

2. Get through the earlier bosses cleanly first

V2 is the final boss, so you arrive at him with whatever health and momentum the rest of the gauntlet left you. Sloppy clears on the earlier bosses mean you reach V2 already low. Treat the whole Boss Rush run as the fight, not just the last room.

3. Separate learning runs from clear attempts

On your first few tries, do not judge by damage alone. Learn where you lose track of V2, where you overextend, and which openings are real. In Mullet MadJack, deaths usually come from the second greedy action, not the first.

4. Stay active without forcing every opening

The game rewards aggression, but a final boss punishes fake aggression. There is a difference between staying mobile and forcing damage into a wind-up. If your attempts fall apart, trim one push from each cycle and clean up your movement first.

Common mistakes

• Thinking “V2” means version 2 of the game. It is a boss — Punished V2 from ULTRAKILL — not a release label.
• Searching the campaign for a hidden chapter. V2 is the final boss of Boss Rush Mode; the story does not contain him.
• Running an outdated build. The crossover came in the free December 19, 2024 update. Without it, the content is simply not there.
• Standing still to trade. The electric shockwave and explosives are built to punish stationary players.
• Saving all your discipline for V2. He is the last boss in a gauntlet — the earlier fights decide what shape you arrive in.

Practical takeaway

Stop looking for a “version 2” of Mullet MadJack. Update to the crossover build, open Boss Rush Mode, and fight your way to the end — Punished V2 is the final boss waiting there, an ULTRAKILL guest with an electric shockwave, explosives, and the “Duel” track behind him. Clear the earlier bosses cleanly so you reach him with resources to spare, then beat him on spacing and discipline rather than raw fire. If you want to push past a single clear into ranked-clear and S-rank territory, our achievements guide for 100% and S-rank clears covers what comes next, and the Mr. Bullet boss guide breaks down the campaign’s other marquee fight.