Metaverse game development services: building a 3D game with NFT items

Metaverse game development services build shared 3D game worlds in which some items, such as characters, wearables, land or vehicles, are NFTs that players hold in their own wallets and can trade. The game itself runs on normal game servers, and the blockchain records who owns each item.

This guide explains which data belongs on-chain, which token standards and wallets suit a game, and what the play-to-earn collapse taught about game economies. It also covers app store rules, team costs and the questions to ask a studio.

Metaverse game development since play-to-earn

Play-to-earn games grew fast in 2021, and players in some countries treated them as a source of income. The games then collapsed as token prices fell and fewer new players joined. Several 3D worlds sold land before they released a game, and those worlds never found an audience.

Studios that still build NFT metaverse games in 2026 mostly treat NFTs as one feature of a game that has to be worth playing first.

What goes on-chain and what stays on the server

The design starts with the core loop: what players do minute to minute, what they work toward over a week, and why they return. The team then reviews every object that persists between sessions and asks whether players gain something from owning it outside the studio's database.

One test helps: put on-chain only what players would be upset to lose if the studio closed. Everything else stays on servers that the studio can patch.

Token standards and contract design

Choosing standards

• ERC-1155 is the usual standard for game items. One contract holds many item types, each with its own supply, so a studio can mint 10,000 copies of a common jacket and one copy of a legendary sword. Batch transfers also cost less gas.
• ERC-721 suits unique assets, such as land parcels or hero characters with their own history.
• ERC-6551 token-bound accounts let an NFT own other assets. A character NFT can carry its own inventory, so the gear moves with the character on a sale. ERC-6551 is still in Review status, and marketplaces and indexers must do extra work to show what each token-bound account holds.
• EIP-2981 lets a collection declare a royalty on resales. Marketplaces decide whether to pay it, and most open marketplaces do not enforce it, so royalties are an unreliable source of income.

The guide to NFT token development covers these standards in more depth.

Withdrawals and deposits

Many games keep items as records in the game database until a player chooses to withdraw one to a wallet. The game server then signs a mint authorization, and the player, or a relayer service that pays the gas for the player, sends that authorization to the chain. A deposit reverses the process: the contract locks or burns the item, and the game credits it back to the player's account.

This hybrid model keeps the game fast, because only players who want on-chain ownership cause gas costs. Signed mints need three safeguards:

• The signed message includes a nonce, an expiry time and the chain ID, so nobody can replay it.
• The signing key sits in an HSM or an MPC service.
• The server limits the rate of withdrawals, so a hacked server cannot mint unlimited items.

Choosing a chain

Games need low fees, fast confirmation and good wallet support. Common choices are Ethereum layer 2 networks, gaming networks such as Immutable's chain and Ronin, and Polygon PoS, which now uses the POL token. BNB Smart Chain and non-EVM chains such as Solana and Flow are also used. Three factors decide the choice:

• Where the target players already hold wallets.
• Which marketplaces support the chain.
• How much support the network gives, such as grants and launch partners.

A game that avoids bridges avoids a major risk, since bridges have been the most common target of large exploits in blockchain gaming.

Wallets that do not block new players

A new player who must install a browser extension and write down a seed phrase before the tutorial often quits. Four patterns remove that step:

• Embedded wallets. The game creates a wallet from an email or social login, and MPC or secure hardware protects the keys.
• Smart accounts. ERC-4337 accounts let the studio pay gas for players and bundle several actions into one. Since the Pectra upgrade on May 7, 2025, EIP-7702 also lets a normal Ethereum account act like a smart account.
• Session keys. A session key works only with the game contract, so players do not sign every action.
• Gradual self-custody. Players start with a managed account and can move to their own wallet later.

The guide to Web3 wallet development compares custody models.

Economy design: lessons from play-to-earn

Early play-to-earn games paid players in a fungible token that players sold for cash, and most of that cash came from new players who bought in. When growth slowed, token prices fell and rewards lost value, so players left and pushed prices down further. Axie Infinity is the best-known example, and its Ronin bridge was also hacked in 2022.

Five lessons came out of that period:

• Remove what you add. Every item or coin that enters the economy needs a way out, such as crafting costs, repairs, upgrades or cosmetic burns.
• Do not promise income. Marketing that presents play as earnings attracts players who only want money and invites regulators to treat the token as an investment.
• Keep the game fun at any token price. A game that no one would play with tokens worth zero will not survive a long price fall.
• Sell looks and status, not power. Pay-to-win items split the player base and invite claims of gambling.
• Simulate the economy before launch. Model groups of players over time, and keep drop rates and crafting costs adjustable on the server.

What metaverse game development services cover

A full engagement runs through eight phases:

1. Game design document. The document covers the core loop, progression, social features and a list of on-chain and off-chain data.
2. Playable prototype without a blockchain. If the prototype is not fun, tokens will not fix the game.
3. Economy model. A spreadsheet or simulation tests the economy against fast and slow player growth.
4. Contracts. The team builds on audited libraries such as OpenZeppelin, with roles, pausing and a written upgrade policy.
5. Backend integration. The team adds an ownership indexer, a signing service for mints, inventory sync and marketplace listing.
6. Security. An external smart contract audit covers the contracts, and a penetration test covers the signing service and the game server.
7. Closed beta. The beta runs on a testnet first, followed by a limited mainnet launch with caps on withdrawals and minting.
8. Live operations. The team ships content updates, tunes the economy, blocks bots and manages the community.

Questions to ask a studio

• Which games has the studio shipped, and how many players do they have now?
• Who on the team has designed a game economy, and can we see the model?
• Which audit firm reviewed the studio's past contracts?
• How does the signing service protect its keys and limit withdrawals?
• Do we own the source code, the art source files and the contracts' admin keys?

Cost and team

An NFT game is a game first, and games cost a lot to build. The ranges below are illustrations, not quotes, and assume blended rates of $60 to $150 per hour:

Contracts and audits are a small share of these budgets, and most of the money goes to art, game design, server engineering and live operations. A quote for a "complete metaverse NFT game" at a small fraction of these budgets almost always describes a reskinned template.

Distribution and store rules

• Steam. Steam's partner rules do not allow apps built on blockchain technology that issue or allow exchange of cryptocurrencies or NFTs.
• Apple App Store. Apps must use in-app purchase to sell NFT services such as minting, listing and transfers. An app may not unlock features because a user owns an NFT. On the US storefront, apps may also link to outside purchase pages.
• Google Play. Google Play has a separate policy for apps that sell or let users earn tokenized digital assets such as NFTs.
• Web and direct download. These channels avoid store rules but lose store discovery.

The overview of initial game offerings covers token sales that fund a game before launch, and their risks. The guide to Web3 game development covers the wider field.

Frequently asked questions