This jam is now over. It ran from 2022-06-20 00:00:00 to 2022-07-12 15:00:00. View results


Nervos Network Blockchain present...

Over $50,000 USD worth of prizes and awards!!!


BlockJam is a free global virtual conference and hackathon where developers can learn and build together to usher in a game development revolution using blockchain that aligns incentives the right way for both developers and gamers.

This value-packed conference starts on June 17th and then kicks off with 2-days of talks and sessions from Web3 & Gaming experts followed by a 14-day GameJam right here on itch!

To join this game jam, please read and understand the rules below. 

To start off, here are the big rules!

  1. Any game engine may be used, however, recommended is Unity Engine
  2. Playmaker or other visual scripting tools may be used
  3. Submissions must use the Nervos Blockchain in some way.
  4. You may work alone or in a team
  5. One project per person or team may be submitted
  6. Failure to follow the BlockJam code of conduct will result in disqualification from the event.
  7. We strongly advise joining live the two days of talks leading up to the Jam on June 18th - June 19th, 2022



Install Unity Game Engine:

Install ChainSafe Unity SDK:

Use sample Unity code to get connected to Nervos Godwoken EVM (note the RPC address) L2:

Watch ChainSafe SDK Help Videos:

Join us on Nervos Blockchain Discord:

Playmaker - ChainSafe Quick Start:



Over $50,000 USD worth of prizes, cryptocurrency, and bounties will be awarded for BlockJam 2022!!!

Bounties may be combined with either BlockJam 2022 game jam track. 

Track 1 - Create New Game with Blockchain Integrated

Create a new game, gameplay loop, or tool in Unity that integrates using Nervos Godwoken Blockchain (EVM). The project must be from scratch or use open source/free tools. It may not be started before the game jam begins. You must share your code on github during the judging period (but it does not need to be open sourced). 

Judged by Public Vote
1st - $15,000
2nd - $5,000

Track 2 - Add Blockchain to Existing Game Project

Have a finished or half-finished game or tool? Why not start there. In this track add blockchain technology into your existing game, tool or use a sample unity project to start. You do not need to share your code on github during the judging period. (But you must share your blockchain contract addresses).

Judged by Public Vote
1st - $15,000
2nd - $5,000

* Cash prizes are to be paid in USDC or CKB, chosen by the winners.



-- Dignitas Bounty --

Task: Use the Dignitas NFTs already deployed to the Nervos Godwoken Blockchain in your game. (see contract address below)

NFT Contract Address:


Has 5 items. From tokenURI 0 - 4.

Judges:  Ian K. Partilla and James  "Bakery" Baker of the Dignitas Esports Team!

Judging Criteria: Best and most creative use of Dignitas NFT and NFT attributes in-game.

Prizes: Nintendo Switch + 5 games / 5 Bounties Available 


-- Filecoin Bounty --

Task: Build projects that use IPFS for content-addressing and/or Filecoin for decentralized, persistent storage. (Submissions that use either technology indirectly via,,, Textile, or other tooling also qualify).
All types of projects are welcome and we welcome your creativity. Feel free to browse past winners (here)[] for inspiration.

Submission guidelines At a minimum submissions should include the following items:

  1. Project Description The name and summary of the project. Names/pseudonyms of team members and contact info (e.g., GitHub handle, email address, or other). 
  2. How the project uses Filecoin and/or IPFS and/or decentralized storage services that build on top of either with example links to where in code those technologies are used.
  3. Link to the publicly visible source code repository Include a link to the working demo (game) or provide a testing guide.
  4. Showcase 2-3 minute video that presents the idea, including a brief demo that demonstrates the use of IPFS and/or Filecoin or anything that builds on top of them. If applicable, select the appropriate track when submitting the project.

NOTE: Submitting the same project across multiple hackathons will lead to disqualification
Only projects or features (preferably in a separate branch) built specifically for the respective hackathon will be considered for prizes.
Broken links may disqualify the project from the judging process.
Using an IPFS HTTP gateway doesn’t count as building on top of IPFS. Exclusively basing your submission on that does not make you eligible for prizes.

Judges: Filecoin Team

Judging Criteria:

  1. Novelty/Creativity: Does it have unique and novel features or combine features of other products or services in a unique and novel way? Does it solve a new problem? Is it creative and puts a smile on people’s faces?
  2. Potential Impact: Does it fill a gap in the universe, and have the potential to be used frequently by a large, growing and diverse audience or market?
  3. Technical Accomplishment: Is the code elegant, clean, and technically interesting? Is the project complete?
  4. Filecoin & IPFS Implementation: Does the project interact with IPFS/Filecoin under-the-hood (i.e., more than simply retrieving a CID from a gateway)? Does it use,, or other storage helpers?
  5. Design: How is the UX/UI/DX? Is it easy to use? If targeting developers, is the experience smooth and intuitive? Does the visual design delight you?


  • Top prize $5000 prize / 2 Bounties Available
  • Runner Up $1000 / 5 Bounties Available

-- ChainSafe SDK Bounty --

Bounty Description:

ChainSafe’s gaming SDK, web3.unity, helps developers build games with blockchain support and NFT-backed game assets. The SDK works on any EVM-compatible blockchain like Nervos, and allows reads/writes and simplified login across browser, mobile, and desktop platforms.

web3.unity recently added support for minting NFTs directly within a game, using a drag-and-drop Unity prefab. Users can claim ERC 721 and ERC 1155 NFTs once they accomplish in-game actions, rewarding them for play.

The ChainSafe Gaming team wants to see what you can build with this new minting functionality. This hackathon prize is for the best game, interactive experience, or developer tool built using the web3.unity minter.


  • Your project must use the web3.unity minter prefab
  • Open source is preferred but not required. Code must be visible during judging.
  • Your project description must mention how you used the web3.unity minter, and where in the codebase this usage can be seen
  • Your project must have a live, deployed, public, interactive demo that can be used by judges and other hackathon participants
  • Your project must include a video presentation of the game and technology behind it, explaining how you used the minter prefab in your project


Judging Criteria:

  • Use of ChainSafe SDK
  • Gameplay
  • Visual Impression
  • Creativity
  • Creative use of the minter

** All submissions to this bounty must use this SDK. Special consideration will be given to projects that use web3.unity minter prefab feature.


The top three submissions will each win $500 CAD cash (fiat) or equal value in crypto (ETH).




The BlockJam Game Jam 2022 will take place between:

Start - June 20th (Monday) 8:00 AM, YOUR LOCAL TIME
End - July 5th (Monday) 8:00 AM, YOUR LOCAL TIME

(Over the years its been hard to get everyone on the same time zone, so now we just dont bother.)


Judged by your peers, the community (and yourself). The community will have a chance to play all the attendees' games. 

Rank is judged by:

  • Use of Web3/ Blockchain
  • Gameplay
  • Visual Impression
  • Audio
  • Creativity

* Bounties will be judged by the team who set the bounty separately.

Target Platform

In order for games to be judged, they must be easily playable by the community.
PC and WebGL are recommended.

Game Submission

  • You may submit your game anytime during the game jam window. 
  • Remember itch has an upload limit of 750MB.  Dropbox files can transfer to itch quickly.
  • Remember to write down your contract addresses deployed for gamejam for the submissions period
  • During submission you will be asked which track and bounty you are applying for



Chat & Communication

Live chat and communication during the jam will be held on Nervos Discord. 
Everyone is welcome to join (not just participants). The channel is both technical and social.

ChainSafe SDK Support:

ChainSafe SDK Documentation:

Filecoin/NFT.Storage Documentation:

Nervos Godwoken Blockchain Documentation:

Nervos Godwoken Support:

Filebase Documentation:



Blockjam 2022 is a virtual community conference to support the amazing game developers community. We highly encourage supportive behavior towards your fellow team members and participants irrespective of gender, sex, nationality, or belief so that we all can grow and learn together. 




Entry to this gamjam is FREE. Never share your account password or metamask private keys with anyone.

All projects must use the Nervos Network (Godwoken EVM L2) Blockchain in order to qualify to win. Either by showing their source code (track 1) or by showing the contracts used, including deployment addresses (track 2).

The value of cryptocurrencies for winners will be calculated on the final date of voting for this event from USD to CKB or USDC using Coingecko's closing day rates. Winners for Track 1 and Track 2 may choose CKB or USDC.

Winners are responsible for any fees associated with receiving or using a prize, including but not limited to, wiring fees or currency exchange fees. Winners are responsible for reporting and paying all applicable taxes in their jurisdiction of residence (federal, state/provincial/territorial and local).

The Nervos Network Blockchain has the right to reject any winners on the grounds of code of conduct misconduct, breaking of rules listed on the Blockjam 2022 landing page, or legal regulations. The next highest project will then become the winner and so forth down the line.

In the event that no suitable projects are submitted to a track or bounty, the prize money will return to the relevant sponsor. If it cannot be returned to the sponsor, it will be donated to a registered charity.

Physical items will be shipped where possible. In the event that physical items cannot be shipped, gift cards of equal or greater value will be gifted to the winners. Winners are responsible for their own import tax or duties. All winners will be contacted by email before sending any physical items to confirm.

If a Team or Organization is entering the Gamjam, they must appoint and authorize one individual (the “Representative”) to represent, act, and enter a Submission, on their behalf. By entering a Submission on behalf of a Team or Organization you represent and warrant that you are the Representative authorized to act on behalf of your Team or Organization. The submission account owner will be this representative as confirmed by the email account used upon submission.

This hackathon is not open to:

  • Individuals who are residents of, or Organizations domiciled in, a country, state, province or territory where the laws of the United States or local law prohibits participating or receiving a prize in the Hackathon (including, but not limited to, Brazil, Quebec, Russia, Crimea, Cuba, Iran, North Korea, Syria and any other country designated by the United States Treasury's Office of Foreign Assets Control) 
  • Sponsors or organizers of this event (or their family members, parent company or subsidiary). However, speakers (if not also sponsors) may participate.

Intellectual Property: Your Submission must: (a) be your (or your Team, or Organization’s) original work product; (b) be solely owned by you, your Team, your Organization with no other person or entity having any right or interest in it; and (c) not violate the intellectual property rights or other rights including but not limited to copyright, trademark, patent, contract, and/or privacy rights, of any other person or entity. 

An Entrant may submit a Submission that includes the use of open source software or hardware, provided the Entrant complies with applicable open source licenses and, as part of the Submission, creates software that enhances and builds upon the features and functionality included in the underlying open source product. By entering the Gamjam, you represent, warrant, and agree that your Submission meets these requirements.

If at any time prior to the deadline, an Entrant or prospective Entrant believes that any term in the Official Rules is or may be ambiguous, they must submit a written request for clarification. 

All Submission materials must be in English or, if not in English, the Entrant must provide an English translation of the demonstration video, text description, and testing instructions as well as all other materials submitted. 

By entering, all Entrants (including, in the case of a Team or Organization, all participating members) agree to release the Gamjam sponsors from any and all liability in connection with the Prizes or Entrant’s participation in the Gamjam. Provided, however, that any liability limitation regarding gross negligence or intentional acts, or events of death or body injury shall not be applicable in jurisdictions where such limitation is not legal.

Looking for a team, support, or chill? Join us on Discord server!


All submissions
Browser playable (7)
Windows (4)

No submissions match your filter

You have loose no more. Follow toastman as he gets those bytes, pays homage and laughs the entire time.
Role Playing
Play in browser
Breed, Mutate, Cross Koonies and make them fight
An alpha version of web3 village simulator based on Nervos Network Godwokne Layer 2.
Play in browser
Blockchain BlockJam
Play in browser
Defend One of the Ancient Tree's from the wreckless orcs
Play in browser
Harness your inner artist and create the best blade the world has ever seen
Play in browser
A 3D casual arcade game inspired by Doodle Jump
Play in browser
ZOM is a TCG world where Zombies battle against rivals to become a hero and lead your horde to victory.
Card Game
A simple side scroller that brings together many passions of the multi billionaire Melon Husk
A third-person adventure game to save the world from climate crisis
Helicoprun endless runner game
Play in browser