Fallout 4: The Ultimate Exploration Hacker & Locksmith Build Guide
This article is based on information current as of June 15, 2026. Fallout 4 is a single-player game and does not feature seasonal content like Fallout 76. The latest major update was the next-gen console update released on April 25, 2024, which included the addition of performance and quality modes, improved stability, and quest fixes. Since then, several patches have been released to integrate Creation Club content, improve the UI, and fix bugs, but there have been no direct balance adjustments to Perk performance, so this guide remains valid for the current version.
In the desolate Wasteland ravaged by nuclear war, countless stories and valuable supplies lie dormant beneath the rubble. Locked doors, password-protected terminals... if you can't sleep at night wondering what lies beyond them, this "Hacker & Locksmith Build" is for you. Hone your Perception and Intelligence, combine them with stealth techniques, and become the ultimate infiltrator, uncovering every secret in The Commonwealth.
Build Overview and Features
The "Hacker & Locksmith Build," as its name suggests, is a build focused on maximizing exploration freedom by fully utilizing the "Locksmith" and "Hacker" Perks. It significantly broadens gameplay possibilities, allowing you to recover valuable items, Junk, and Stimpaks from normally inaccessible rooms, delve deeper into the world's background story through logs left on terminals, or even hack security systems to turn hostile turrets into allies.
The core of this build is a focused investment in the S.P.E.C.I.A.L. stats of Perception and Intelligence. However, this build's strength isn't just limited to exploration. By ensuring high Agility and combining it with stealth Perks like "Sneak" and "Ninja," it also excels as a sneak attacker, achieving objectives without being detected. It's possible to avoid combat or neutralize enemies before being discovered, allowing for a very stable playstyle. While there isn't a culture of "S-rank" specific builds in Fallout 4, this build is one of the highly effective styles with clear strengths in exploration and stealth combat.
S.P.E.C.I.A.L. and Perk Configuration
The foundational S.P.E.C.I.A.L. allocation for the build and the Perk acquisition plan as you level up are key to success. Here, we introduce a recommended configuration that balances exploration and stealth.
Recommended Initial S.P.E.C.I.A.L. Allocation
You start with 28 S.P.E.C.I.A.L. points. The following allocation aims to acquire essential Perks early while enhancing stealth combat capabilities. The "You're SPECIAL!" book can be found under Shaun's crib in Sanctuary and allows you to increase any stat by +1. Here, we assume it will be used for Perception.
| S.P.E.C.I.A.L. | Initial Value | Purpose and Reason |
|---|---|---|
| Strength | 3 | To acquire the "Armorer" Perk, essential for armor modification. It also slightly increases carrying weight. |
| Perception | 4 | A prerequisite for the "Locksmith" Perk. Raise to 5 early with "You're SPECIAL!" to also connect to the "Rifleman" Perk, which increases V.A.T.S. accuracy. |
| Endurance | 1 | Set to the minimum as stealth play is primary, not assuming taking damage. In Survival mode, consider allocating a bit more. |
| Charisma | 3 | To acquire "Lone Wanderer," which provides damage reduction and increased carrying weight when adventuring solo without a companion. If you prioritize settlement development, raising it to 6 for "Local Leader" is also a good option. |
| Intelligence | 4 | A prerequisite for the "Hacker" Perk. Also connects to "Gun Nut" for weapon modification and "Science!" for energy weapon modification. |
| Agility | 7 | Essential for acquiring "Sneak," the basis of stealth, and "Ninja," which amplifies sneak attack damage. It also increases Action Points (AP), which pairs well with a V.A.T.S.-heavy combat style. |
| Luck | 6 | Significantly enhances V.A.T.S. combat with Perks like "Better Criticals" (increases critical damage), "Critical Banker" (fills the critical meter faster), and "Grim Reaper's Sprint" (V.A.T.S. kills restore AP). "Idiot Savant" (Luck 5), which boosts experience efficiency even with low Intelligence, is also powerful. |
Perk Acquisition Priority During Level-Up
Deciding which Perks or SPECIAL stat enhancements to acquire with each level-up is crucial. The table below is merely an example; please adjust it to suit your playstyle.
| Level Range | Prioritize acquiring/ranking up Perks |
|---|---|
| Lv 2 - 10 | Locksmith (1), Hacker (1), Sneak (1-2), Rifleman or Gunslinger (1-2), Idiot Savant (1) |
| Lv 11 - 25 | Locksmith (2-3), Hacker (2-3), Ninja (1-2), Gun Nut (1-2), Armorer (1-2), Sneak (3) |
| Lv 26 - 40 | Rifleman/Gunslinger (3-4), Ninja (3), Mister Sandman (1-2), Science! (1-2), Better Criticals, Critical Banker |
| Lv 41 - | Final ranks for each Perk, Locksmith (4), Hacker (4), Grim Reaper's Sprint, and enhancements to Luck-based Perks like Four Leaf Clover. |
Equipment and Playstyle
The true potential of this build is unleashed by understanding appropriate equipment and situational playstyles.
Primary Weapons, Armor, and Companions
- Primary Weapons: Non-automatic rifles or pistols that can equip a suppressor are your mainstays. In the early game, a suppressed Pipe Gun or Hunting Rifle is good. Later, "Overseer's Guardian" (a unique combat rifle), combat rifles with legendary effects, or Gauss Rifles become powerful. For pistol enthusiasts, the unique pistol "Deliverer," obtainable through Railroad quests, is an excellent companion.
- Primary Armor: Leather or Combat Armor with the "Shadowed" modification to enhance stealth is fundamental. For legendary effects, "Chameleon" (renders you invisible when standing still), "Sprinter's" (increases movement speed), and "Powered" (increases AP refresh speed) are highly useful. Also, actively search for "U.S. Covert Operations Manual" magazines found throughout the wasteland, as they permanently boost your stealth capabilities.
- Companions: Considering compatibility with stealth play, Deacon, a member of the Railroad, is ideal. His companion Perk extends the duration of Stealth Boys and increases sneak attack damage, abilities perfectly suited for this build. On the other hand, if you prefer to act alone, the "Lone Wanderer" Perk is extremely powerful, reducing damage taken and increasing carrying weight, which significantly boosts exploration efficiency.
Playstyle from Early to Late Game
- Early Game (Lv 1 - 15): During this period, combat ability is low, so avoid direct confrontations as much as possible. First, prioritize acquiring rank 1 of "Locksmith" and "Hacker" and explore around Concord and Lexington to accumulate items, Junk, and Stimpaks. Prioritize using suppressed weapons and take down enemies one by one without being detected.
- Mid Game (Lv 16 - 35): Perk ranks for "Sneak," "Ninja," and "Gun Nut" will increase, making the strengths of this build clear. You'll be able to attach self-made suppressors to powerful rifles or pistols and deal significant damage with V.A.T.S. headshots. In terms of exploration, you'll gain access to "Master" level locks and terminals, dramatically expanding your scope of action and the quality of obtainable supplies.
- Late Game (Lv 36 - ): Your primary combat and stealth Perks will be largely complete, making you nearly unstoppable. By acquiring "Mister Sandman" and Luck-based critical Perks, your sneak attack damage will become immense. You'll be able to reign over the Wasteland as a legendary ghost, infiltrating even the most heavily guarded facilities undetected, extracting all information, and claiming treasures.
Adapting to Survival Difficulty
This build is well-suited for Survival difficulty. The stealth playstyle, which makes it easy to avoid combat, significantly reduces the risk of taking damage, making it a major advantage in Survival where death is ever-present. Furthermore, high exploration capability is extremely useful for securing vital resources for survival, such as often scarce medical supplies, ammunition, and clean water.
However, with Endurance set to 1, you will be extremely vulnerable to unexpected encounters or mines. As countermeasures, it's effective to utilize the damage resistance from the "Lone Wanderer" Perk, or allocate some initial S.P.E.C.I.A.L. points to Endurance (e.g., raise it to 3 to acquire "Toughness"). A cautious playstyle is required, constantly being aware of your surroundings and using Perception to discover and disarm mines and traps.
Summary
The "Hacker & Locksmith Build" is one of the best choices for players who wish to uncover all the secrets hidden in Fallout 4's vast world and experience every corner of it. The process of unlocking sealed doors and deciphering encrypted terminal records, one by one, provides a sense of accomplishment beyond compare.
Furthermore, by combining high stealth capabilities with powerful sneak attack damage, it allows for a very strong and safe playstyle in combat as well. Lurk in the shadows of the Wasteland, peer into the depths of its stories, and acquire legendary treasures. Why not weave your own tale of adventure with this build?
