12 Words That Own Everything: Seed Phrases and Embedded Wallets, Explained

Imagine if your game account had no "forgot password" button. No support ticket, no recovery email. If you lose the password, the account is gone forever. If someone else sees it, everything in it is theirs. That's how a traditional crypto wallet works, and the "password" is a list of 12 or 24 ordinary words called a seed phrase.

For blockchain games, that list has been one of the biggest barriers to new players. This is what it is, and how studios are trying to make it disappear.

What a seed phrase actually is

A crypto wallet doesn't store your items or tokens; those live on the blockchain. What a wallet stores is a private key, a huge secret number that proves you control an address. Anyone with the key can move everything at that address.

Long numbers are hard to write down, so in 2013 Bitcoin developers proposed a standard, BIP-39, that turns the secret into words. It uses a fixed list of 2,048 English words. Your wallet picks 12 or 24 of them at random; together they encode the secret, plus a small checksum to catch typos. From that one phrase, a wallet can regenerate all of your keys, on any compatible app.

Why it's so unforgiving

That design gives you full control, and full responsibility:

• Lose the phrase, lose the wallet. There's no company that can reset it.
• Share the phrase, lose the wallet. Anyone who sees it can drain everything, instantly and irreversibly.
• Scammers know this. Fake "support agents", fake game sites and fake wallet updates all exist to trick people into typing their seed phrase.

The golden rule is simple: no real game, studio or support team will ever ask for your seed phrase.

Embedded wallets: the gamer-friendly fix

Since around 2023, many blockchain games have stopped asking players to set up a wallet at all. Instead, they use embedded wallets: a wallet created automatically when you sign in with an email address, a social login or a passkey.

How can there be a wallet without a seed phrase? There are a few approaches:

• Split keys. The private key is broken into pieces held by different parties, for example your device and the wallet provider, so no single party holds the whole thing. Together they can sign; apart they can't.
• Smart accounts. With account abstraction, the account itself can define how you recover it, such as through a trusted device. (See our account abstraction explainer.)
• Secure hardware. Some designs keep keys inside your phone's secure chip, unlocked with your fingerprint or face.

Immutable's Passport is a well-known gaming example: players sign in with familiar logins and get one wallet that works across the games on Immutable's network. When Immutable merged its two blockchains in 2026, Passport users' items moved over without them doing anything.

What you give up

Embedded wallets are easier, but they're a trade:

• You depend on a provider. If the company behind the wallet changes its service, you need a way to export your keys, and not every wallet makes that easy. During Immutable's merger, users of one older wallet type were told they might need to export keys.
• Your security is your email's security. If someone takes over your email account, your wallet may be at risk too. Turn on two-factor authentication.
• It's less portable. A classic wallet works in any compatible app; an embedded one may be tied to a game or network.

WGC's advice

• For small, casual play: embedded wallets are fine and much less stressful.
• For anything valuable: learn how to export your keys, store the backup offline, and enable two-factor on the email tied to the wallet.
• Never type a seed phrase into a website you reached from a link, an ad or a direct message.

The best wallet is one you never think about while playing and always know how to get back into. For more on what those wallets actually hold, read Do you really own that NFT sword?