# Technology $GOG is an ERC-20 token issued on Ethereum. They are tradeable by anyone and listed on Automated Market Makers such as Sushiswap and centralised exchanges such as OKX. All blockchain assets in the game (items, Guardians, pets) are ERC-721 tokens. These will be issued on [Immutable zkEVM](https://www.immutable.com/products/immutable-zkevm), a chain for games that offers EVM compatibility, low cost, massive scale, and Ethereum security: * Supports custom smart contracts * Enables advanced gameplay mechanics * Enables advanced tokenomic functionalities * Ethereum security * Small gas fee per transaction with low friction for gamers As part of Immutable’s ‘Gas Free for Gamers' initiative, at the outset, Guild of Guardians will be sponsoring gas fees for all Immutable Passport users in the game, abstracting away these fees to enable frictionless onboarding and providing a streamlined gaming experience. Players can immerse in blockchain activities like minting and transfers without the concern of gas fees, ensuring a smooth and uninterrupted gaming journey. The Guild of Guardians game is a mobile game which is planned for release on iOS and Android. It is built in Unity and directly playable on any supported mobile phone. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://portal.guildofguardians.com/technology.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.