Build and Conquer City Level 4 Guide

City level 4 — still unverified numbers

Checked 15 October 2026 · version notes for Roblox V0.1 where they apply

Original city-building illustration, not an in-game screenshot

What to extend when level 3 is behind you

No verified level-4 population or building checklist was found. Read the current client requirement; the checks here address production stalls and do not guarantee an unlock.

From a working level-3 city, the stalls I would fix next are steel supply, fuel for vehicles, and power coverage that still holds after you add another factory. Those are production problems. They are also the reason a city stops feeling like it is leveling.

The nuclear claim, quoted as a conflict

The linked troubleshooting page is the source of the level-4, 10,000–20,000 population and 60-minute capture claim. The official game overview gives none of those requirements. A community guide is evidence that a claim exists, not proof that the mechanic is correct.

Until someone shows the in-game requirement text from V0.1, this site will say only that nuclear power sits late in the chain, if it sits in the chain at all. The power page repeats that caution.

Original military-themed illustration, not a game weapon reference

Questions

Does level 4 unlock the nuclear plant?

One community troubleshooting page claims that combination, including 10k–20k population and a 60-minute capture. No developer or current-client evidence confirms it. Status: unverified.

Should I wait for a number before I play?

No. Density, power, water, steel, and a working factory are the same work whether the badge flips at an unpublished count.

Sources checked 15 October 2026

Roblox game page — Build and Conquer [V0.1] — Official description, place 103767961452227. Checked 15 October 2026.
Build and Conquer Wiki — community guides — Community report, checked 15 October 2026: early housing, 250 population, utilities, and worker loop. Not developer documentation.
Build and Conquer Game Wiki — building troubleshooting — Community nuclear requirements conflict with other level claims. Checked 15 October 2026; do not use them as a confirmed unlock.