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For Roblox’s Block Defense Alpha by RedManta, the experience listing displays GAMEPAD and 5KTHX, each for 1,000 Emeralds. That listing is the clearest source for those codes, but it does not confirm that either still redeems successfully. Other guides report more codes and disagree on spellings and status, so treat every entry below as unverified until you try it in-game.
Block Defense codes reported by current sources
The official Roblox experience listing names the game Block Defense Alpha and its creator, RedManta. It displays GAMEPAD and 5KTHX as rewards of 1,000 Emeralds each. Third-party guides report additional entries, but their lists conflict and no source here confirms a successful current redemption.
| Exact code | Reported reward or status | What to know |
|---|---|---|
| GAMEPAD | 1,000 Emeralds on the Roblox listing; marked active by Roblox Den and working by Pro Game Guides. | Best-supported candidate across the sources, but current redemption is unconfirmed. |
| 5KTHX | 1,000 Emeralds on the Roblox listing. Roblox Den marks it expired. | The official listing and a third-party status label disagree; test this exact spelling. |
| 5KTHNX | Pro Game Guides lists it as working for 1,000 Emeralds; Roblox Den marks it “Check.” | Do not treat this as interchangeable with 5KTHX; the spelling differs. |
| 15KGOLDN | Roblox Den and Pro Game Guides report it active/working for 1,000 Emeralds. | Third-party reported; no current successful redemption is established. |
| DOUBLEMILLION | Roblox Den marks it “Check”; Pro Game Guides lists it expired, with 1,000 Emeralds. | Conflicting status; uncertain. |
| LIKES1000 | Roblox Den marks it “Check”; Pro Game Guides lists it expired, with 1,000 Emeralds. | Conflicting status; uncertain. |
| WEEK5 | Pro Game Guides lists it as working for 1,000 Emeralds. | Single-guide report; validity unresolved. |
| TY4KLIKES | Pro Game Guides lists it as working for 1,000 Emeralds; Roblox Den lists it expired. | Conflicting status; uncertain. |
Codes can expire or change, and a guide’s “working” label does not guarantee a code will succeed in your session. Enter the exact string shown, including its spelling, and rely on the in-game result rather than assuming a listed reward is still available.
How to redeem Block Defense codes
Third-party guides describe this redemption sequence; it has not been independently tested here. Button labels or placement may differ if the game interface changes.
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#1 Best Overall
Roblox Physical Gift Card
- Redemption: Online only. Robux cards can only be redeemed in a browser at Roblox.com/redeem. They cannot be redeemed in the Roblox mobile app or any video game console.
- Roblox is an immersive platform for connection and communication. Every day, millions of people come to Roblox to create, play, work, learn, and connect with each other in experiences built by our global community of creators.
- Get more with every Roblox Gift Card! From now on, when you redeem a Roblox gift card, you get up to 25% more Robux. Perfect for gaming, creating, and exploring- more Robux means more possibilities!
- Deck out your avatar and unlock additional perks in your favorite experiences when you use Roblox Gift Cards to purchase Robux (Roblox's virtual currency).
- Each gift card grants a free virtual item upon redemption.
- Open Block Defense Alpha on Roblox.
- Select the Codes button in the game.
- Enter the code in the code-entry box, matching its spelling exactly.
- Press Claim and check whether the game accepts it and awards Emeralds.
If a code does not work
- Check the spelling. In particular, sources show both 5KTHX and 5KTHNX; they are different strings.
- Try again with the exact characters. Avoid extra spaces before or after the code.
- Use the game’s response as the result. The available listings do not establish live validity, and third-party status labels conflict.
- Distinguish an expired code from a mistyped one. A failure does not by itself show which issue occurred; the game’s message, if any, may clarify it.
What Block Defense Alpha is
RedManta’s Roblox experience is a cooperative base-building game in which players fight waves of monsters. The official listing describes players teaming up with friends to build a base and defeat those waves. Codes are presented as a way to claim Emeralds, but an advertised reward should not be mistaken for proof that a code remains redeemable.
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![Roblox Digital Gift Card - 5,250 Robux [Includes Exclusive Virtual Item] [Digital Code]](https://m.media-amazon.com/images/I/41TsWfyqleL._SL160_.jpg)
Roblox Digital Gift Card - 5,250 Robux [Includes Exclusive Virtual Item] [Digital Code]
- The easiest way to add Robux (Roblox’s digital currency) to your account. Use Robux to deck out your avatar and unlock additional perks in your favorite Roblox experiences.
- This is a digital gift card that can only be redeemed for Robux at Roblox.com/redeem. It cannot be redeemed in the Roblox mobile app or any video game console. Please allow up to 5 minutes for your balance to be updated after redeeming.
- Roblox Gift Cards can be redeemed worldwide, perfect for gifting to Roblox fans anywhere in the world.
- From now on, when you redeem a Roblox Gift Card, you get up to 25% more Robux. Perfect for gaming, creating, and exploring- more Robux means more possibilities!
- Every Roblox Gift Card grants a free virtual item upon redemption.
Rank #4
![Roblox Digital Gift Card - 2,000 Robux [Includes Exclusive Virtual Item] [Digital Code]](https://m.media-amazon.com/images/I/41HFZ1Pdg2L._SL160_.jpg)
Roblox Digital Gift Card - 2,000 Robux [Includes Exclusive Virtual Item] [Digital Code]
- The easiest way to add Robux (Roblox’s digital currency) to your account. Use Robux to deck out your avatar and unlock additional perks in your favorite Roblox experiences.
- This is a digital gift card that can only be redeemed for Robux at Roblox.com/redeem. It cannot be redeemed in the Roblox mobile app or any video game console. Please allow up to 5 minutes for your balance to be updated after redeeming.
- Roblox Gift Cards can be redeemed worldwide, perfect for gifting to Roblox fans anywhere in the world.
- From now on, when you redeem a Roblox Gift Card, you get up to 25% more Robux. Perfect for gaming, creating, and exploring- more Robux means more possibilities!
- Every Roblox Gift Card grants a free virtual item upon redemption.
Rank #3
![Roblox Digital Gift Card - 2,500 Robux [Includes Exclusive Virtual Item] [Digital Code]](https://m.media-amazon.com/images/I/41p8GJ7ZLdL._SL160_.jpg)
Roblox Digital Gift Card - 2,500 Robux [Includes Exclusive Virtual Item] [Digital Code]
- The easiest way to add Robux (Roblox’s digital currency) to your account. Use Robux to deck out your avatar and unlock additional perks in your favorite Roblox experiences.
- This is a digital gift card that can only be redeemed for Robux at Roblox.com/redeem. It cannot be redeemed in the Roblox mobile app or any video game console. Please allow up to 5 minutes for your balance to be updated after redeeming.
- Roblox Gift Cards can be redeemed worldwide, perfect for gifting to Roblox fans anywhere in the world.
- From now on, when you redeem a Roblox Gift Card, you get up to 25% more Robux. Perfect for gaming, creating, and exploring- more Robux means more possibilities!
- Every Roblox Gift Card grants a free virtual item upon redemption.
Rank #2
![Roblox Digital Gift Card - 1,000 Robux [Includes Exclusive Virtual Item] [Digital Code]](https://m.media-amazon.com/images/I/419axeltOqL._SL160_.jpg)
Roblox Digital Gift Card - 1,000 Robux [Includes Exclusive Virtual Item] [Digital Code]
- The easiest way to add Robux (Roblox’s digital currency) to your account. Use Robux to deck out your avatar and unlock additional perks in your favorite Roblox experiences.
- This is a digital gift card that can only be redeemed for Robux at Roblox.com/redeem. It cannot be redeemed in the Roblox mobile app or any video game console. Please allow up to 5 minutes for your balance to be updated after redeeming.
- Roblox Gift Cards can be redeemed worldwide, perfect for gifting to Roblox fans anywhere in the world.
- From now on, when you redeem a Roblox Gift Card, you get up to 25% more Robux. Perfect for gaming, creating, and exploring- more Robux means more possibilities!
- Every Roblox Gift Card grants a free virtual item upon redemption.
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