Game guide

The Noob Experiment TD Guide: How the game works

[REBALANCE & 2X🎉] The Noob Experiment TD

Tower Defense Games!!, Playing 121, Rating 88.4%

Creator Tower Defense Games!!

Playing 121

Rating 88.4%

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About

Overview

The Noob Experiment TD is a tower defense game where you place units on a map to stop waves of infected Noobs from reaching your base. This guide covers the basics of spending cash, upgrading units, working through the difficulty modes, leveling up, and playing with friends.

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What is on this page

Contents

01 How the game works Summary 02 Placing and managing your units Step 03 Difficulty modes and what they unlock Tips 04 Leveling up and long-term goals Check 05 Getting extra cash with redeem codes Warn 06 Working codes Codes 07 Glossary Words 08 Common questions FAQ

How the game works

Summary

In short You spend cash to place units, then hold off each wave while your cash grows.

When you load in, you receive some starting cash. Spend it to summon units and drop them on the map — they attack enemies on their own from that point. Each wave you survive adds more cash, letting you summon stronger units as the run goes on.

Cash　the currency you spend to summon and upgrade units
Units　the characters you place on the map that fight automatically
Waves　each incoming wave brings more enemies and more cash on completion
Co-op　difficulty scales up when friends join, but so do the rewards
Codes　redeem codes in-game for bonus cash

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Placing and managing your units

Step

In short Use E to upgrade and X to remove units as the game progresses.

Good placement along the enemies' path matters from the first wave. As the run gets harder, you will need to adjust rather than just add more units.

Upgrade it press E on a placed unit to boost its attack power and range
Remove and reposition press X to delete a unit if you need cash back or want to change your layout

Difficulty modes and what they unlock

Tips

In short The game has multiple difficulty levels. Extreme is the hardest and is noted as the best mode for earning cash.

The game has five named difficulty levels. Extreme is the hardest and is noted as the best mode for earning cash. A separate New Mode exists and features Boss Noob 3.0 and the Infected Guest Mech boss. There is also an Endless survival mode.

Tips worth knowing

Extreme Mode is the toughest and the best for earning cash
New Mode introduces the Infected Guest Mech and Boss Noob 3.0 as boss enemies
Endless survival mode is a current feature of the game

Leveling up and long-term goals

Check

In short Reaching the level milestones and clearing harder modes gives you concrete targets to aim for across many sessions.

The game tracks your level separately from individual runs. Badges mark the milestones along the way.

Reach level 1 to earn your first level badge
Hit levels 5, 15, 20, 30, 50, and 100 each has its own badge to earn
Pull a Legendary rarity unit from the summon system
Pull a Godly rarity unit, which requires considerable luck
Beat Insane Mode, rampage 2000 enemies, and play for 25 minutes to complete the DD Collab quest and unlock new skins
Clear New Mode to earn the War Event badge by defeating Boss Noob 3.0 and his allies

Getting extra cash with redeem codes

Warn

In short Codes give 400 to 777 cash each, but they expire and can only be used once per account.

There is currently one working code tracked for this game. Codes are handed out periodically by the developers and added to the in-game code box.

Worth watching out for

Each code can only be redeemed once entering it a second time does nothing

Expired codes will not register even if the spelling is perfect

Type carefully the wrong capitalization makes the code invalid

Liking and favoriting the game page helps you catch new code announcements faster

06 Working codes Codes

NETD

Every code, and the votes on it, are on the codes page

Community strategy ideas

Community

These ideas and tips come from people playing the game. Share your discoveries too!

No strategy ideas yet. Share a tip you discovered.

Glossary

Cash: The in-game currency used to summon and upgrade units, earned between waves and through codes.
Unit: A character you summon and place on the map that attacks enemies automatically.
Wave: One round of enemies advancing toward your base; completing it earns additional cash.
Noob: The infected enemy characters that attack your base in each wave.
Legendary / Godly: The two highest rarity tiers for units, with Godly being rarer and requiring significant luck to pull.
New Mode: A special difficulty that features Boss Noob 3.0 and the Infected Guest Mech as bosses.

Common questions

FAQ

How do I redeem a code?

Find the code input box inside the game, type the code exactly as shown — correct capitalization matters — and confirm it. Your cash is added immediately if the code is still active.

What is the DD Collab quest?

It is a multi-part challenge that requires you to get a Legendary unit, beat Insane Mode, rampage 2000 enemies, and spend 25 minutes in-game. Finishing all four steps unlocks new skins from the collab.

Does it cost anything to play fully?

No purchase is required. Redeem codes give between 400 and 777 cash each.

Updated Oct 18, 2026
Game updates can change what is on this page. If you spot something, get in touch and let us know.

[REBALANCE & 2X🎉] The Noob Experiment TD Tower Defense Games!!, Playing 121, Rating 88.4%

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