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Mutant Plants Base Defense is a Roblox tower defense game where you hold the line against waves of enemies using mutated plants. Every Fruit you apply to a plant rolls a chance at a powerful Mutation, and Gems are what keep that upgrade loop going. Free codes hand you both, along with Grenades that can freeze or burn enemies mid-wave. Here are every active code available right now and exactly what to do with what you earn.
All codes below are confirmed active as of August 10, 2026. The two grenade codes are the newest additions, so redeem those first before anything else.
| Code | Reward | Status |
|---|---|---|
| UPD1665452 | 10 Frozen-Grenades | New |
| UPD6512356 | 10 Flame-Grenades | New |
| RELEASE | 100 Gems | Active |
| BUGFIX000 | 200 Gems | Active |
| BUGFIX999 | 200 Gems | Active |
| BUGFIX785 | 200 Gems | Active |
| BUGFIX154 | 5 Venom Fruits | Active |
| BUGFIX652 | 5 Void Fruits | Active |
| BUGFIX56954 | 5 Shadow Fruits | Active |
| RELEASE1 | 500 Gems | Active |
| RELEASE2 | 10 Void Fruits | Active |
| RELEASE3 | 10 Reversion Fruits | Active |
There are currently no expired codes in the game, which means every code listed above still works.
The redemption process takes about 30 seconds. Here is the exact path:
Code redemption screen
Gems from codes feed into two systems: the Secret Fruits shop for Mutations, and the Upgrade Zone for base stat improvements. Knowing which to prioritize matters.
Each Fruit applies a percentage chance to give one of your plants a specific Mutation. Higher-cost Fruits have lower success rates, but the Mutations they unlock are stronger.
| Fruit | Cost | Mutation Chance | Mutation Type |
|---|---|---|---|
| Frozen-Fruit | 50 Gems | 15% | Frozen |
| Flame-Fruit | 70 Gems | 13% | Fire |
| Venom-Fruit | 90 Gems | 11% | Venom |
| Shadow-Fruit | 150 Gems | 9% | Dark |
| Void-Fruit | 180 Gems | 7% | Bomb |
| Reversion Fruit | 400 Gems | 100% | Restores original state |
The Reversion Fruit is the safety net here. At 400 Gems with a guaranteed 100% success rate, it undoes any Mutation you regret applying. If you burn through your Void Fruits chasing the Bomb Mutation and end up with something you don't want, one Reversion Fruit fixes it.
The codes give you 10 Void Fruits and 10 Reversion Fruits directly through RELEASE2 and RELEASE3, so you have a solid starting stack for both offense and correction.
The Upgrade Zone lets you spend Gems on permanent stat boosts. None of these are flashy, but they compound across every wave.
Grenades sit in the Secret tier of weapons, meaning they're not part of your standard plant loadout. They deal area-of-effect damage, making them useful for clearing clusters of enemies that break through your plant line.
The two Grenade types from the new codes do different things:
Combining both is the obvious play. Freeze a group to stop their advance, then follow up with a Flame-Grenade to stack burn damage while they're locked in place. Ten of each from the new codes gives you plenty of room to experiment with that approach.
To equip Fruits from your inventory, press the Backpack button on the left, select Fruits, and click whatever you want to load into your action slots.
Upgrade Zone stat options
The game's official Discord channel is the fastest place to catch new codes when they drop. New codes tend to appear alongside updates, milestone events, and bug fix patches, which explains why most of the active codes use names like BUGFIX and UPD.
If you enjoy collecting free rewards across Roblox games, the All Star Tower Defense X codes guide covers free Gems, Trait Burners, and Bounded Cubes for one of the platform's biggest tower defense titles.
For more free reward guides across the platform, the full Roblox guides collection covers active codes and strategy breakdowns for dozens of games. If mutation-based progression systems are your thing, the Cut Grass for Brainrots mutations guide breaks down every Gold, Diamond, Rainbow, and Electro variant worth targeting.
