Yes, you can play Sonic 4: Episode I and Episode II offline on Xbox 360. The original answer was incorrect.
Details
Both are **single-player platformers** with **no mandatory online requirement**.
You **do not need Xbox Live Gold** or an internet connection to play the campaign, time attack, or special stages.
Online features (optional):
Leaderboards (requires Xbox Live Silver/Gold + connection).
Episode II co-op (local only — second controller; no online co-op).
Episode Metal (unlockable in Ep II if Ep I save detected — works offline).
Potential Confusion Sources
Xbox Live Arcade (XBLA) DRM: On a **non-home console**, you must be **signed in to Xbox Live** (Silver is fine) to verify the license. On your **Home Xbox**, play fully offline.
Episode II "Metal" Unlock: Checks for Ep I save on *same profile* — works offline.
Delisting: Both were delisted 2020. If you own them, they're in "Ready to Install." If not, cannot purchase.
Bottom Line: Pop in the disc (if physical) or launch digital on your Home Xbox → Play fully offline. No Gold needed.
