Fallout 4: All Achievements in One Playthrough

1. Early Game Preparation

• Create a save before choosing a faction to allow for different outcomes.
• Explore thoroughly to complete location-based and miscellaneous achievements.
• Increase SPECIAL stats strategically for level-based achievements.

2. Faction Management Strategy

You'll need to juggle faction quests to unlock their respective achievements while avoiding hostile outcomes too early.

Step-by-Step Plan for Main Story Achievements

• Join the Institute to unlock Institutionalized but delay final commitment.
• Complete Brotherhood of Steel quests up to Blind Betrayal without hostility.
• Advance Railroad quests to unlock Underground Undercover but don’t turn on the Institute yet.
• Make a save before Mass Fusion, as this mission locks you into a faction.

Step-by-Step Plan for Endgame Achievements

• Institute Ending: Finish End of the Line for Powering Up.
• Brotherhood Ending: Load the save before Mass Fusion, side with Brotherhood, complete Ad Victoriam.
• Railroad Ending: Reload your save and complete Precipice of War for Underground Undercover.
• Minutemen Ending: Destroy the Institute via The Nuclear Option for Prepared for the Future.

3. Miscellaneous Achievements

• Settlement-Based: Build workshops and artillery for Community Organizer and Benevolent Leader.
• Companion Achievements: Rotate companions to get Lovable (maxing relationships).
• Combat & Progression: Get Legend of the Wastes by reaching Level 50 and various combat feats.

Final Tip

Keep rotating saves so you can reload key moments to experience multiple endings.

Prioritize exploration to unlock side achievements like The Harder They Fall (killing legendary enemies).