Most "blockchain games" aren't really onchain. They're traditional games with a crypto wallet bolted on — maybe some NFTs, maybe a token, but the actual game? That runs on regular servers like any other title.
Fully onchain games are different. The game logic itself — every move, every rule, every outcome — executes on a blockchain. No central server calling the shots. No company that can pull the plug. Just code, running autonomously, forever.
It's a weird idea if you're used to traditional game development. But stick with me, because this changes what games can be.
The Difference: Assets vs Logic
Here's the simplest way to think about it:
Traditional blockchain games: Your sword is an NFT. Cool. But the game that sword exists in? Runs on AWS. If the company shuts down, your NFT points to nothing. It's a receipt for a product that no longer exists.
Fully onchain games: The entire game runs on the blockchain. Not just your items — the combat system, the economy, the world state, all of it. If the original team disappears tomorrow, the game keeps running. Anyone can build a new client to interact with it.
That's not a subtle distinction. It's the difference between "you own a JPEG" and "you own part of a living system that nobody controls."
Why Would Anyone Build Games This Way?
Fair question. Running game logic onchain is harder than spinning up a server. It's more constrained. So why bother?
1. Permissionless Building
When a game's logic is onchain, anyone can build on top of it. Write a new client. Create mods. Build tools. Fork the whole thing and take it in a different direction.
This already happens. Dark Forest, one of the first fully onchain games, spawned dozens of community-built tools and plugins. Players built better maps, automated strategies, and entirely new ways to play — without asking permission.
Try doing that with Fortnite.
2. Credible Neutrality
Onchain games can't play favorites. The rules are public, verifiable, and apply equally to everyone. No shadow bans. No secret nerfs to your favorite character because someone complained. No "we changed the drop rates but didn't tell anyone."
For competitive games and games with real stakes, this matters. A lot.
3. Persistence
Traditional games die when they stop being profitable. Servers shut down, and everything players built disappears.
Onchain games persist as long as the underlying blockchain exists. The original developers can move on, and the game continues. Communities can maintain and evolve games across decades, not just until the next quarterly earnings call.
4. Composability
This is the weird one, but maybe the most interesting.
Onchain games can interact with each other. Items from one game could theoretically work in another. Achievements could unlock content across multiple titles. Entire economies could connect.
Projects like Realms are already exploring this — building interconnected game worlds where assets and progress flow between experiences. We're not fully there yet, but the foundation exists. When game logic is just smart contracts, games become building blocks, not walled gardens.
What Fully Onchain Games Look Like Today
Let's be real: we're early. Fully onchain games in 2026 tend to be:
- Turn-based or tick-based: Real-time action doesn't mesh well with blockchain transaction times (yet)
- Strategy-heavy: Chess, tactics games, and empire builders work great
- Persistent worlds: Games where the state evolves over time, even when you're not playing
Some examples:
Dark Forest: A space exploration game where you discover and conquer planets. The map is procedurally generated and hidden using zero-knowledge proofs. Players built incredible tools around it.
Loot Survivor: A dungeon crawler where adventurers explore, fight, and (usually) die. Every action is onchain. Deaths are permanent. The leaderboard is eternal.
Realms/Eternum: A strategy game built on Starknet where players build empires, manage resources, and wage war. The entire world state lives onchain. The Realms ecosystem has been pioneering autonomous world development since the early days of onchain gaming.
These aren't the flashy AAA titles you're used to. But they're doing something those games can't: running without anyone's permission.
The Tech That Makes It Possible
You can't just deploy a Unity game to Ethereum and call it a day. Fully onchain games need specialized infrastructure:
Application-specific rollups: Instead of competing for blockspace with DeFi traders, games get their own chain optimized for game logic. Fast, cheap, and built for the use case.
Onchain game engines: Frameworks like Dojo (built on Starknet) provide the primitives game developers need — entity component systems, state management, client synchronization.
Account abstraction: Players shouldn't need to understand gas fees and transaction signing. Modern wallets hide the complexity so gaming feels like, well, gaming.
This is what Cartridge builds. We're not trying to convince traditional game devs to learn Solidity. We're building the infrastructure that makes onchain games feel like regular games to players while preserving all the benefits under the hood.
The Tradeoffs (Let's Be Honest)
Fully onchain games aren't strictly better than traditional games. They're different, with real constraints:
Performance: You're not running Unreal Engine 5 onchain. The games that work best are ones where the game state matters more than the graphics.
Cost: Every transaction costs something, even on cheap rollups. Games need to design around this or subsidize it.
Complexity: Building onchain is harder than building on Unity. The tooling is improving fast, but there's still a learning curve.
Adoption: Most players don't care about decentralization. They care about fun. Onchain games need to be good games first, onchain second.
The developers building in this space know all this. They're choosing these tradeoffs deliberately because they believe the benefits — true ownership, permissionless building, credible neutrality — are worth the constraints.
Why This Matters Beyond Gaming
Games are often where new technologies get battle-tested. Social features, virtual economies, digital identity — games pioneered all of these before they spread elsewhere.
Fully onchain games are experimenting with:
- Digital ownership that doesn't depend on any company
- Autonomous systems that run without operators
- Economies with transparent, verifiable rules
- Communities that can fork and evolve their own spaces
These ideas have implications way beyond gaming. But games are where they'll get refined, because games can afford to experiment.
Where We're Headed
Fully onchain games won't replace all games. They don't need to.
But they will carve out their own space: games where ownership matters, where the rules need to be trustworthy, where communities want to build and extend what developers create.
We're building Cartridge because we think that space is going to be massive. And we want the infrastructure to be ready when it is.
Building an onchain game? Cartridge provides the infrastructure — game-specific rollups, player-friendly wallets, and developer tools. Check out our documentation or jump into our Discord.