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Sparks are Summer’s currency. Players buy Sparks once and spend them in any Summer game. Your game shows a shop of the items you’ve published, and the player presses Buy. Summer then asks the player to confirm, takes the Sparks and adds the item to the player’s inventory. Your game never handles money, prices at checkout or balances, so there’s nothing in your code for anyone to tamper with. You earn 70% of the Sparks players spend in your game, about 56% of what they pay.

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Games like this

Fortnite

An item shop of skins and emotes, bought with the game’s currency.

Valorant

A store of weapon skins that players keep and show off in every match.

Roblox games

Each game sells its own items for one currency players use across games.

Rocket League

Car bodies, decals and wheels, bought once and used in every mode.
If your game sells something a player keeps, such as a skin, a character, a level pack or an upgrade, this is the page for you.

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What your players get

Four steps: the game's shop lists items with Sparks prices, Summer asks the player to approve the purchase, Summer adds the item to the player's inventory, and the game unlocks it so the player wears it. Four steps: the game's shop lists items with Sparks prices, Summer asks the player to approve the purchase, Summer adds the item to the player's inventory, and the game unlocks it so the player wears it.
1

Browse

Your shop lists the items you’ve published, with their Sparks prices. It works from the main menu; players don’t need to be in a match.
2

Confirm

The player presses Buy, and Summer shows its own purchase screen. The player approves or declines there, and Summer takes care of the Sparks, receipts and refunds. A player can buy several items together as one purchase.
3

Own it

The item appears in the player’s inventory, and your game unlocks it. The player keeps it after reinstalling, and on every device they play on.
You create the items and set their Sparks prices in your game’s catalog in Studio, then publish them. On summer.games, selling items for Sparks is the Join the Summer economy option for games built in Summer. See Charge for your game and accept tips for the other ways to earn.

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Pick your setup

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A shop in your game

Show your published items in your own shop screen, styled like the rest of your game. Your game asks Summer to check out and shows how the purchase went. Some purchases take a moment to confirm, so the shop waits for Summer’s answer rather than guessing.

Add a shop. List my items with their Sparks prices and let players buy them.

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Unlock what players own

Players can see everything they own in your game’s menus. Their inventory follows them to every device, so the menus unlock from the inventory, not from a single purchase. That way an item bought on a phone is also there on the desktop.

Unlock owned items in my menus. Owned items show as unlocked everywhere.

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Items that change the match

When an item changes what happens in a match, such as a skin other players see or a character a player picks, your game’s server checks the player’s inventory itself before it accepts. The player’s game asking for the item doesn’t count as proof, so nobody can wear something they haven’t bought. A player's game asks to wear the gold crown. The game's server reads that player's inventory itself: if the crown is owned, everyone sees it; if not, the request is refused. A player's game asks to wear the gold crown. The game's server reads that player's inventory itself: if the crown is owned, everyone sees it; if not, the request is refused.

Check ownership on my server. Players can only use items they own, and everyone sees them.

For skins, hats and other looks, Let players wear cosmetics goes further.

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Not sure which fits?

Plan my game's store. Your agent reads your project and proposes what to sell. No code.

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Testing it on your machine

Under Local Play the shop and checkout report that they aren’t available, so you test the path where your game hides the shop. Owned items work: give your test players items in your Local Play test users file, and your menus and your server’s ownership check see them. Real purchases need a hosted game.
Does this not help you? Reach out on Discord!