Compare the first launch and later visits
A web game often avoids a separate app install and can be opened from a link, but it still needs to load its files and may depend on the publisher's site. A download can take more storage and requires installation or unpacking, then may be easier to launch again from a library. Check device compatibility and whether the game is available for the operating system you own before downloading.
Neither format guarantees offline use. Disconnect and test if playing without coverage matters. For web games, ask whether assets are cached and what stops working. For downloaded games, read the store page for network requirements, account login, DRM or launcher conditions, and whether updates are needed before starting.
Check updates, saves and storage
The web version may change when the publisher updates its hosted files. A downloaded version may need a patch before a new session, and its saves can live in local folders or an account cloud. Look for the specific publisher's save-transfer instructions if you plan to change devices. Keep a copy of important progress only through supported tools rather than assuming a browser cache is a backup.
itch.io's creator documentation distinguishes browser-playable HTML games from downloadable projects and describes an embedded browser option for HTML uploads. That is an example of a platform offering more than one delivery route, not a promise that every creator's upload has both versions or identical features.
Choose one test before you commit
If storage is tight or you are borrowing a device, try a trusted web edition. For a specific offline mode, controller layout, or larger display, check the publisher's downloadable build and requirements. Compare editions directly; do not assume they share modes, purchases, or progress.
Questions about downloadable games vs web games
Are downloaded games always playable offline?
No. An installed game may still require a connection for sign-in, authentication, multiplayer, or content. Check the publisher's stated requirements and test the mode you need.
Does a web game always require internet?
No, but many web games depend on a server or uncached assets. The label does not define offline behavior; verify it with the publisher and test after disconnecting.