Save Syncing for Longer Demos

spawnd demos are typically short-form experiences, but for longer or narrative-rich games, we recommend offering continuity between the demo and full game on Steam.

Here are a few methods to consider:

1. Local Save (Easier)

• Generate a local save on the user's computer, which they can then import from the base game and restore their state.

2. Generate Transfer Codes for Steam (More complex, not always applicable)

• Allow players to export a unique code while playing the demo or at the end.

• This code encodes their save data (base64/JSON);

• The demo offers an UI to copy a "transfer code";

• This code can be "redeemed" in the full Steam game via a input UI, so it can decode and load this save state.

  References:

  • Reddit - WebGL savegame
  • YouTube - Unity How to save and load files using Json and Base64

Note: spawnd currently does not yet provide a built-in save syncing API, so these are developer-implemented solutions.