Connect Nintendo, Battle.net, FFXIV, RetroAchievements, Roblox & Destiny 2

All of these live in dashboard → Connections:

• Battle.net — click Link via OAuth and sign in with Blizzard. No key needed.
• Nintendo — link with your Nintendo username/ID. No key needed.
• FFXIV — paste your Lodestone character ID (the number in your character page URL: …/lodestone/character/12345678/). In-game, set Character Configuration → Privacy → Display Achievements on Lodestone so your achievements are public.
• RetroAchievements — enter your username plus your Web API key from retroachievements.org → Settings → Keys.
• Roblox — link your username. Badge reads need your inventory set to public in Roblox privacy settings.
• Destiny 2 — click the Bungie sign-in and authorize; triumphs sync from your Bungie.net profile.

You can connect as many platforms as you like — the ⚡ Smart overlay URL automatically follows whichever one you're actively playing.