What is Immutable X and what does it do?

Immutable X is a blockchain network for games, built on top of Ethereum by the Australian company Immutable to make trading NFTs and in-game items fast and cheap. It was the company's first network. Immutable scheduled its move into a newer network, Immutable Chain, for February 2026, and as of October 2026 its docs present Immutable Chain as the main network. Even so, the name Immutable X is still widely used for the project and its IMX token.

What is Immutable X built on?

The original Immutable X is a layer 2 on Ethereum that, according to Crypto.com, was powered by StarkEx, a zero-knowledge rollup engine. It bundled many trades off Ethereum and posted proofs back to it, so players did not pay gas on each move. Its focus was NFTs and game items.

Immutable later launched Immutable zkEVM in early 2024, built with Polygon. Immutable's docs now describe Immutable Chain as a gaming chain built on Ethereum that runs the Ethereum Virtual Machine, so developers can use Solidity and standard tools. Blocks and finality take about two seconds, and assets move to and from Ethereum through bridge contracts.

What does Immutable X do?

Immutable gives game studios the pieces they need to add digital ownership. Its docs list:

• Passport, a login with a built-in wallet, which can sponsor gas so players pay nothing
• Orderbook and Checkout, tools for listing and buying items
• Asset contracts for creating game items as NFTs
• Play, a hub for quests, rewards and finding games

Immutable now calls itself a growth platform for games, and also sells player analytics tools. Games on its networks have included Gods Unchained, Guild of Guardians and Illuvium, Decrypt reported. For the wider picture, see what is web3 gaming.

What is Immutable IMX?

IMX is Immutable's token, with a maximum supply of 2 billion. According to Immutable's docs, it pays gas on Immutable Chain. Crypto.com describes three other roles:

• Governance, where holders vote on proposals such as how token reserves are used
• Staking rewards, paid to users who meet activity conditions
• Fees, since marketplace fees could be settled in IMX or ETH

In October 2024 the US SEC sent a Wells notice to Immutable, a sign it was considering charges. The Block reported that Immutable said in March 2025 the SEC had ended the investigation.

What happened to Immutable X?

In April 2025 Immutable said it would combine Immutable X and Immutable zkEVM into one chain. The plan was to move assets automatically, with players using Passport or wallets like MetaMask receiving their items on the new chain.

According to eGamers, Immutable X was set to become read-only on February 11, 2026, with automatic migration due to finish on February 25, 2026. Collection addresses changed in the move, so anyone checking an old item should look it up on Immutable Chain rather than the original network.