Off the Grid’s Avalanche Subnet Architecture Explained

Gunzilla Games launched Off The Grid in Early Access, a cyberpunk extraction royale that runs its entire digital economy on a custom Avalanche subnet called Gunz. This setup is not a generic layer 2 solution; it is a sovereign L1 chain with specific rules and validator sets. The game uses this infrastructure to handle NFT transactions for weapons, skins, and cybernetic limbs directly on-chain. I find this approach effective because it isolates the game’s heavy transaction load from the primary network, preventing fee spikes during peak gameplay. The architecture allows for sub-second finality, which is essential for a real-time shooter where lag would ruin the experience.

How the Subnet Works

Avalanche defines a subnet as a dynamic set of validators working together to achieve consensus on the state of a set of blockchains. Each blockchain is validated by exactly one subnet, but a single node can be a member of many subnets simultaneously. In the case of Gunz, the subnet operates independently while still benefiting from the security of the primary Avalanche network. The team built this chain using the Subnet EVM, a virtual machine that implements the Ethereum Virtual Machine and supports Solidity smart contracts. This means developers can use standard tools like MetaMask and Remix to interact with the chain, just as they would on Ethereum. The Subnet EVM runs in a separate process from the main AvalancheGo process and communicates via a local gRPC connection. This separation ensures that the game’s logic does not interfere with the core protocol operations.

The consensus mechanism relies on repeated sub-sampled voting, where each validator queries a small, random subset of other validators. If a supermajority of the sample prefers a transaction, the validator adopts that preference until the network reaches irreversible finality, typically within one to two seconds. This deterministic finality is faster than Ethereum’s probabilistic model, which requires roughly 12.8 minutes for finality after The Merge. For a battle royale with up to 60 players in multiplayer mode, this speed is critical. The chain also supports Interchain Messaging (ICM), allowing assets to move natively between different Avalanche L1s without third-party bridges. This eliminates the risk associated with external bridge software.

Why It Matters for Players

The cost to launch a sovereign L1 on Avalanche dropped significantly with the Etna hard fork, reducing the requirement from 2,000 AVAX to just 1,333 AVAX. This lower barrier made it feasible for Gunzilla Games to deploy their own chain rather than renting space on a shared network. Delphi Ventures became the largest validator of the Gunz blockchain in September 2024, signaling institutional confidence in the infrastructure. The integration with OpenSea further expands the market for these in-game items, making Gunz the ninth blockchain supported by the marketplace. However, the system is only as strong as its validators. If a subnet contains no active validators, its state becomes invalidated, and any blockchain on it stops functioning entirely. This is a genuine risk that centralized validation models mitigate less effectively than permissionless networks.

I recommend this architecture for any project needing isolated throughput and custom compliance rules. The ability to enforce KYC/AML checks or geographical bounds natively on the chain makes it suitable for regulated environments. Yet, interoperability remains a manual process compared to Ethereum’s deep composability. Developers must build explicit bridges or use ICM to connect their subnet to other chains. Does the isolation outweigh the complexity of managing multiple independent chains? That question depends on your specific regulatory needs and user base size. For now, the performance gains are undeniable.