Can You Unlock Achievements While Offline on Xbox Live? No – Online Required

No, you cannot unlock achievements when disconnected from Xbox Live.

Reasons:

• Online Tracking: Achievement progress and unlocks are managed by Xbox Live servers.
• Sync Required: Your console must connect to Xbox Live to sync progress and award achievements.
• Offline Limitation: While some games allow offline play, achievement progress is not tracked or awarded in this mode.

Note: Even in games supporting offline play, certain achievements may explicitly require an online connection to unlock (usually noted in the achievement description).