Skip to content
BKZ Guide — Build and Kill Zombies Guide

King 1x1x1x1

The guides that mention this boss mention only its name. Here is the fight, read off recordings frame by frame.

You do not reach it. It arrives.

The run screen carries a permanent NEXT BOSS IN timer. When it hits zero, a green broadcast reads “1x1x1x1 is coming! Press ATTACK to join the battle.” and an ATTACK button appears. After a kill the timer resets to just under an hour, so the cycle is roughly hourly and it is the same for everyone on the server. That is why “which wave is the boss on” has no answer: the game has no waves.

I Built the STRONGEST CAR to SURVIVE..

Recorded by Default on YouTube — a player’s video, not an official one

Starts just before the timer runs out. Everything this page describes is on screen: the 1x1x1x1 health bar at 70.0K, the DAMAGE LOG ranking each player, the green grid arena, and the red circles on the ground.

The fight

Health
70,000 · The bar is labelled 1x1x1x1
Players
Everyone at once · A damage log ranks each player's share
Arena
A separate green grid · Not the road you were driving on
Fuel
Unlimited · Shown as an infinity symbol during the fight
Its attack
Red circles on the ground · They land where they are marked; a hit takes about 40
Reward
2,000 Hacker Tokens · spent in the event shop, where the top item costs 11,000
The revive prompt during the boss fight, with a timer and Revive and Leave buttons

Your seat was destroyed!, then REVIVE? with 17.63 on the timer, a Revive! button with the Robux symbol and 24 under it, and Leave. The background at this moment is the lobby.

Frame at 10:10 of I Built the STRONGEST CAR to SURVIVE.., recorded by Default — a player’s video, not an official image

Dying opens a REVIVE? prompt with about twenty seconds on it, and reviving in the boss fight is a paid action costing 24 Robux. You can also just leave. While the prompt is up the camera sits back in the lobby, so do not read that as having been thrown out: pay, and the game drops you straight back in with Revived! Back in the fight.

How many actually beat it

Three different figures are all defensible, and every one of them is a ratio of badge awards, not of players. Roblox does not publish how many people have played this game, so nobody can give you that percentage, us included.

  • Roblox's own rarity figure

    Printed on the experience page, labelled Hard, over a recent window

    13.0%
  • Boss badge awards over the widest-held badge

    1,092,504 awards against 8,780,218 for Welcome!

    12.4%
  • Same ratio, yesterday's awards only

    Awards added in the last day, both badges

    11.6%

Bars are scaled to the largest of the three, not to 100%.

The middle figure needs a caveat the other guides leave out: its denominator is not the player base, it is the most widely awarded badge in the game. Every player who reaches that badge is counted; anyone who left before it is not. The real player base is therefore larger, so this figure is a ceiling and the true share of all players is lower. It is used here because it is the largest denominator Roblox actually exposes.

Roblox computes its own figure over a recent window rather than over all time, which is why it sits higher. A site quoting one number with no method attached has not told you which of these three it means, and all three move, so ours are read from the latest snapshot rather than typed in.

A naming trap

In the game the boss is called 1x1x1x1. The word King appears only in the Roblox badge, You defeated the King 1x1x1x1. If you search for the longer name expecting to find it on a health bar, you will not. The guides that cover this boss use the badge name without mentioning the difference.

Still not established

  • Whether this is still the only boss fight. The Zeus event opens on the same NEXT BOSS IN countdown format and a kiosk that names Zeus, not 1x1x1x1 — whether the two fights are the same one relabelled is not shown in anything we have reviewed.
  • Whether the fight has phases. Only the red circles appear in footage, and no player describes a change partway through.
  • Whether any particular car helps. No recording shows a build chosen for the boss, and the arena gives unlimited fuel, which removes the usual reason to optimise one.
  • Whether the fight outlives the event it belongs to. Its badge was still being awarded in large numbers after the event’s listing closed, but the developer has not said the boss stays. The advice players give each other amounts to staying close and circling rather than standing still; that is someone talking over their own footage, not a tested strategy.