Fallout Shelter: How to 100% the House Always Wins Vault

To achieve 100% completion in a House Always Wins experimental vault run in Fallout Shelter, you must stabilize your early bottle cap economy using high Luck stats, halt dweller leveling until Endurance is maxed, and delay room tier upgrades until your staff has adequate weaponry. Prioritizing efficiency over rapid population growth prevents fatal incident wipes and prepares your vault for late-game wasteland combat.

Establishing the Cap and Resource Economy

In a run themed around the calculated efficiency of Mr. House, caps serve as your primary safety net. You must establish sustainable power, food, and water production before constructing non-essential rooms.

Assign dwellers with high Luck to every production room. When a resource cycle completes, high Luck grants a chance to receive bonus bottle caps. Deploying a Mr. Handy on production floors automates this resource and cap collection, prevents resource decay while the game runs in the background, and provides an immediate defense against internal incidents.

Room Type	Primary S.P.E.C.I.A.L.	Secondary Stat Priority	Optimal Merged Size
Power Plant / Nuclear Reactor	Strength	Luck (Cap generation)	3-wide
Water Treatment / Purification	Perception	Luck (Cap generation)	3-wide
Diner / Garden	Agility	Luck (Cap generation)	3-wide
Weapon / Outfit Workshop	Matches recipe	Perception / Agility	3-wide
Medbay / Science Lab	Intelligence	Luck (Cap generation)	2-wide

Managing Room Tiers and Incident Scaling

Internal incident damage in Fallout Shelter scales upward with room upgrade tiers, not solely with vault population. A Tier 3 three-wide room spawns significantly deadlier radscorpions, fires, feral ghouls, and molerats than an un-upgraded room.

To prevent internal disasters from wiping out your workforce:

Delay room upgrades: Keep production rooms at Tier 1 or Tier 2 until all assigned workers wield weapons dealing at least 10–15 average damage.
Use dirt buffer zones: Separate occupied sectors from empty living quarters and storage rooms with unexcavated dirt or empty space.
Isolate empty room incidents: If a fire or infestation breaks out in an unmanned room, let it extinguish or clear itself across buffer gaps rather than sending under-geared dwellers inside.

Maximizing Dweller HP and S.P.E.C.I.A.L. Stats

A dweller's maximum health pool is determined by their Endurance stat at the moment they level up. Dwellers leveled to 50 with low Endurance miss out on permanent health gains, leaving them vulnerable to being eliminated quickly by late-game deathclaws and alpha radscorpions.

Build an optimal roster by following a strict leveling routine:

Halt level progression at Level 1: Place new arrivals and newborn dwellers directly into the Fitness Room without letting them gain experience.
Train Endurance to 10: Maximize their base Endurance before assigning them to combat or wasteland tasks.
Equip Endurance gear before leveling: Outfit trainees with Sturdy Wasteland Gear (+5 Endurance) or Heavy Wasteland Gear (+7 Endurance) before sending them into the wasteland to level from 1 to 50.
Train secondary combat stats: Raise Agility to increase weapon attack speed in quests, Perception to slow down the Critical Hit targeting crosshair, and Luck to charge the Critical Hit meter faster.

Crafting Gear and Managing Quests

Reaching full completion requires clearing elite wasteland quests and repelling deathclaw attacks without casualties. Relying on low-tier weapons creates dangerous bottlenecks during boss encounters.

Direct your workshops to craft specific gear:

Transitional weapons: Arm vault workers and basic guards with Plasma Rifles or Armor Piercing Hunting Rifles.
End-game weapons: Reserve legendary junk—specifically Tri-Fold Flags, Military Circuit Boards, and Chemistry Sets—to produce Dragon’s Maw and Vengeance for quest teams and vault entrance guards.
Stat outfits: Craft Lucky Formal Wear to boost room cap generation and Officer Fatigues for quest combat efficiency.

When deploying three-dweller teams on high-tier quests, assign each explorer 25 Stimpaks and 10 Radaways. Equip pets that provide damage resistance, faster wasteland return times, or increased junk collection. During quest combat, manually focus all dweller fire onto the most lethal target in the room, such as glowing bosses or radscorpion queens, and spend stored Critical Hits to eliminate them before they deplete your medical supplies.