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Every World runs on its own Summer server. You choose two things: how much computing power and memory that server gets, and how many players one World can hold. Start small, play your game hosted with the number of players you expect, and move up a size only when it needs more.

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Games like this

Chess.com, Hearthstone

Turn-based games need very little. Start with Small.

Counter-Strike, Rocket League

Real-time matches with physics. Start with Standard.

Minecraft servers, Valheim

Big worlds that keep running. Start with Large or bigger.
These are starting points, not promises. How much your game needs depends on what it does every frame, so measure your own game.

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What you get

Eight server sizes from Small with 256 MB of memory up to 8XL with 64 GB, each one larger than the last. Eight server sizes from Small with 256 MB of memory up to 8XL with 64 GB, each one larger than the last. Each size gives the server a guaranteed share of the computer’s processor, and lets it burst higher when spare power is available. Memory is a fixed budget.
  • Memory is a hard budget. A server that uses more memory than its size allows is stopped, so leave some headroom.
  • Every size can run one full CPU for your game’s main loop. Only extra work in parallel, such as loading on other threads, can hit the limit on the smaller sizes.
  • Your choice is saved with each version of your game. Publishing a new version with a new size changes the servers for new Worlds; running Worlds keep the size they started with.

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Pick your setup

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One size for the whole game

Set one size for every World your game starts. You choose it in your project, or in the dashboard when you publish a version of your game.

Choose a server size for my game. My agent picks a starting size and sets it.

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Different sizes for different worlds

A game can run more than one kind of World, and each kind can have its own size. A small 1v1 duel can run on Small while your big shared world runs on XL. A World type without its own size uses the game’s size. The game's size is Small. The duel World uses it, while the shared world sets its own size, XL. The game's size is Small. The duel World uses it, while the shared world sets its own size, XL.

Give my world types their own sizes. Small servers for small modes, big servers for big worlds.

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How many players a World holds

Each kind of World can set the most players it admits, from 1 up to 1,024. This is separate from the server size: one sets how many people can be in the World, the other how much power the server has to run it. A matchmaking queue for that World uses the same maximum, and its minimum is how many players it needs to start. See Matchmaking. A World set to hold 8 players with 6 seats taken and 2 free. A World set to hold 8 players with 6 seats taken and 2 free.

Set how many players my World holds. Match the World's maximum to my game design and queues.

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Not sure which fits?

Plan server sizes for my game. Your agent reads your project and proposes sizes and player counts. No code.

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Testing it on your machine

Local Play runs your server on your own computer, so it doesn’t tell you which size you need. To pick one, publish your game and play it with as many players as you expect. Keep an eye on how smooth it feels and on the server’s output in your creator dashboard, then move up or down a size in your next version.
Does this not help you? Reach out on Discord!