Last checked: September 10, 2026
Mini City Tycoon Codes (September 2026) — All Working Codes
Here are all the working Mini City Tycoon codes for September 2026. Mini City Tycoon (place ID 112413741511713) is the city-building tycoon by Aurion Games where you grow a small town into a metropolis — and it currently has two working codes handing out Diamonds. UPDATE19 was redeemed on video by an Earnaldo player on September 7, 2026 (clip in the table below), and Pro Game Guides reports testing both UPDATE19 and FIRST successfully. 100M and UPDATE have now stopped working and moved to the expired list. Redeem the live pair from the cogwheel menu before they rotate.
Active Mini City Tycoon Codes
These codes are confirmed working as of September 10, 2026. Enter them exactly as shown — codes are case-sensitive.
| Code | Reward | Status |
|---|---|---|
| UPDATE19 VERIFIED | 50 Diamonds | Active ▶ Verified on video · Sep 7, 2026 |
FIRST | 50 Diamonds | Active |
Expired Mini City Tycoon Codes
Most Mini City Tycoon codes are time-limited and rotate with updates. We track the confirmed-working set above and move codes here as they expire. UPDATE and 100M moved here on September 10, 2026.
| Code | Reward | Status |
|---|---|---|
UPDATE | 30 Diamonds | Expired — superseded by UPDATE19; Roblox Den filed it expired on September 10, 2026 and Pro Game Guides dropped it from its tested list |
100M | 100 Diamonds | Expired — TechWiser filed it expired, Roblox Den downgraded it to unverified, and Pro Game Guides no longer lists it |
secret | 25 Diamonds | Expired |
200k | 100 Diamonds | Expired |
BUG | 50 Diamonds | Expired |
| Older time-limited codes have expired and been rotated out. | ||
🎁 Mini City Tycoon codes expired or empty-handed?
Codes come and go — earning is forever. Earnaldo pays you real Robux for playing Roblox games and finishing simple tasks. Free to join, no human verification, cash out from your very first point.
Earn Robux instead →How to Redeem Mini City Tycoon Codes
- Run Mini City Tycoon on Roblox.
- Press the cogwheel button on the right side of your screen.
- Click the Code button.
- Type a code into the text box exactly as shown (codes are case-sensitive).
- Hit the green checkmark button to claim your Diamonds.
Where New Codes Are Announced
- Discord — the Aurion Games server posts update codes first.
- Roblox group — follow Aurion Games for milestone codes.
- In-game updates — UPDATE-numbered codes ship with each release.
Earn Free Robux for Mini City Tycoon
Codes give Diamonds, not Robux. Earnaldo lets you earn free Robux by completing simple tasks — no surveys spam, no downloads.
Frequently Asked Questions
As of September 7, 2026 four codes work: UPDATE19 (50 Diamonds), FIRST (50 Diamonds), 100M (100 Diamonds) and UPDATE (30 Diamonds). UPDATE19 was redeemed on video by an Earnaldo player that day. 200k, secret and BUG are in the expired table. We refresh this page as Aurion Games drops new codes.
Run Mini City Tycoon, press the cogwheel button on the right side of your screen, click the Code button, type a code into the text box exactly as shown, and hit the green checkmark button to receive your Diamonds.
Codes are case-sensitive, so check your capitalization and remove any extra spaces. If a code still fails, it has probably expired, since most Mini City Tycoon codes are time-limited. Cross-check against our active list, which we keep current.
New codes are shared through the Aurion Games Discord server and Roblox group, and the UPDATE-numbered codes ship with in-game updates. A new update usually means a new code.
Every current code rewards Diamonds, the premium currency, ranging from 25 up to 100 per code. Diamonds fund premium upgrades and boosts, so codes are a free way to accelerate your city rather than giving Robux.
For the full building and money strategy, read our Mini City Tycoon guide, see how it compares in Mini City Tycoon vs Mega Mansion Tycoon, or visit the hub. You can also learn how to get free Robux in 2026.