Steam app ID
Trigger: !steamid
Try it
Kagi would openhttps://store.steampowered.com/app/slay+the+princess/
Run @steamid in Kagi for Kagi's own results from store.steampowered.com only
URL pattern: https://store.steampowered.com/app/query/
Searches store.steampowered.com, filed under Games (general).