ProtonDB

Triggers: !prdb, !proton, !protondb, !ptn

Try it

Kagi would openhttps://www.protondb.com/search?q=slay+the+princess

Run !prdb in Kagi

URL pattern: https://www.protondb.com/search?q=query

Searches www.protondb.com, filed under Games (general).