The new “Spring Event” in Noob Tower Defense has officially started on Roblox and, as usually happens with every major update, players immediately began searching for active codes that provide free gems, coins, and other in-game rewards.

During May 2026, several promotional codes linked to the UPD3 update are still active and have become one of the fastest ways to obtain resources without spending Robux.
| Code | Reward |
|---|---|
| NTDSPRING | 300 Gems |
| UPD3 | 300 Coins |
| LIKES18K | 400 Gems |
| hallsecret | 200 Coins |
| UPD2 | 300 Gems |
| likes6k | 400 Coins |
| ENDLESS | 500 Cash |
| 18KLIKES | 500 Cash |
Some of these codes were released specifically alongside the “Spring Event,” while others remain active from previous updates. Since developers can disable them at any time, many players recommend redeeming them as soon as possible.
In Noob Tower Defense, gems work as one of the most valuable resources in the game. Their usefulness becomes even greater during limited-time events, where special units and exclusive content usually appear.
Gems are mainly used to summon units, unlock stronger characters, and speed up progression throughout the event. Because of that, every time a new promotional code is released, a large part of the community tries to redeem it before it expires.
The NTDSPRING code is currently one of the most important codes in the game because it provides free gems directly connected to the “Spring Event” content.
The reward redemption system inside the game is very simple and only takes a few seconds.
One important detail is that some codes are case-sensitive. If a code appears as invalid, it is usually because of a typing mistake or because the code has already expired.
Although the developers did not publish a complete breakdown of every new addition included in the event, the community has already identified several changes connected to the spring update.
Among the most notable additions in the “Spring Event” are temporary rewards, gem bonuses, special activities, and summon-related incentives.

These types of events usually remain active for a limited time, so many players use promotional codes to progress faster before the season ends.
Noob Tower Defense developers usually release new codes during major updates, special events, or community milestone celebrations.
The most common places players use to find new codes are:
There are also specialized Roblox websites that monitor new codes daily and update active rewards whenever major changes appear.
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