NFT Gaming Platform Development: Architecture, Economy and Vendors

NFT gaming platform development means building a game, or a platform for several games, where players own in-game items as tokens they can trade outside the publisher's control. This guide covers what goes on-chain, the main components, the lessons from play-to-earn, app store rules, the build order and how to judge a development company.

Most of the design work is deciding how little to put on the blockchain. A good design gives players ownership of valuable items, and a poor design turns the game into a token scheme.

What players get from NFT items

The real benefits are narrower than the 2021 marketing claimed:

• Trading. Players can sell items to other players on open markets. They need neither the publisher's permission nor a risky sale of their whole account.
• Provenance. Anyone can read an item's history from the chain, such as who crafted a sword and which tournament it won.
• Persistence. The token stays in the player's wallet if the game closes, though the item usually loses its use.

Using one item in several games is still rare, because another studio must choose to support the item, and few studios do.

Lessons from play-to-earn

Axie Infinity grew fast in 2021 by paying players in tokens, and many players joined for income rather than for fun. When new money stopped coming in, token prices fell, earnings dropped and players left. Average daily players fell from about 2.7 million to about 250,000, according to a 2023 Reuters report cited on Wikipedia.

On 23 March 2022, attackers stole about $620 million in ETH and USDC from the Ronin bridge that served the game, and the FBI later linked the theft to North Korea's Lazarus Group. Many similar games shut down in the following years.

A game economy needs sinks, which are ways to remove currency and items from the game, and they must do so at the same rate that rewards create them. The game also has to be worth playing without the money. Many studios that survived now use the phrase "play-and-own" and present trading as one feature of the game.

What goes on-chain and what stays off-chain

Many games mint items only when a player asks. The item stays in the game database until the player withdraws it to a wallet. The server then signs a mint permission, and the item becomes a token. When the player deposits the token back, an escrow contract locks it, and the game returns the item to the player's inventory.

Components of an NFT gaming platform

Item contracts

ERC-1155 suits games, because one contract can hold fungible materials, stackable items and unique gear, and it supports batch transfers. Only the game server's signer should be able to mint, and upgrade keys belong in a multisig wallet.

Wallets and onboarding

Most players leave when a game asks them to install a browser wallet and buy gas before they play. An embedded wallet can be created when the player logs in. The studio can pay gas through ERC-4337 smart accounts or EIP-7702 sponsorship, so players can own items before they learn how wallets work. Players who want self-custody should be able to export their keys.

Marketplace

An in-game marketplace with card checkout keeps players inside the game. Trading on open marketplaces gives items more buyers, but the studio has less control over that trading. Many studios take a fee on their own marketplace and accept that some trading happens elsewhere.

Chain choice

Games need cheap, fast transactions, and common choices are gaming networks such as Ronin and Immutable's chain, general Ethereum layer 2 networks such as Base or Arbitrum, and Solana. Frequent game actions do not belong on Ethereum mainnet.

Anti-fraud

Bots collect any reward that has cash value. Limit the rate of withdrawals, require a minimum play time before minting, and watch for one person running many accounts.

App store rules

Mobile stores set limits on NFT features, and Apple and Google have different rules.

• Apple. Under guideline 3.1.1 of the App Store Review Guidelines, apps may sell NFTs and NFT services such as minting with in-app purchase, and may show a user's own NFTs only if owning them does not unlock features in the app. On the US storefront, apps may link to other purchase methods, while other storefronts have stricter limits.
• Google. Google Play's blockchain-based content policy allows apps to sell or reward tokenized digital assets, if the app declares them in the Play Console and labels them in product details. Apps may not promote earnings from play or trading. Apps without a gambling approval may not sell an NFT of unknown value for money, as in a paid loot box.

Both stores change these rules from time to time, so check the current text before you design a mobile purchase flow.

Build order for an NFT game

1. Model the economy in a spreadsheet. List every source and sink of items and currency, and test what happens if item prices fall by 90%.
2. Build the game loop without any blockchain. Test with players to confirm that the game is fun.
3. Choose which items become tokens and when they are minted.
4. Connect embedded wallets and the item contract on a test network.
5. Add the marketplace and the withdrawal and deposit flows.
6. Audit the contracts and run a bot-farming test with real rewards.

What an NFT gaming platform development company delivers

A studio or development company that builds NFT games usually covers some or all of this work:

• economy design and token modeling
• game client and server development in an engine such as Unity or Unreal
• item contracts, minting and escrow contracts
• wallet, gas sponsorship and card checkout integration
• an in-game marketplace and indexing
• anti-bot systems, security testing and coordination of an external audit

Some firms build only the blockchain layer and connect it to a game made by another studio, so ask which of these parts the firm builds and which parts it buys from third-party providers.

How to judge an NFT gaming platform development company

1. Play the firm's past games. Ask for live titles, then check the player numbers and the item contracts on a block explorer.
2. Ask for the economy model. A capable firm shows sources, sinks and a stress test, not only a token sale plan.
3. Check contract security. Ask for public audit reports and for the way the firm stores minting and upgrade keys.
4. Ask who owns the code and keys. The development contract should state that your studio owns the source code, the smart contracts and the admin keys.
5. Treat token-first pitches with caution. A firm that starts with a token sale and a play-to-earn model repeats the 2021 pattern.

Cost drivers

The blockchain game development and Web3 game development guides cover the build in more depth, and games set in a virtual world are covered in metaverse NFT game development. Fundraising through game launchpads is explained in the overview of initial game offerings.

Frequently asked questions