This Fallout 4 mod turns the RPG into a full roguelike dungeon crawler

A new Fallout 4 roguelike mod turns Bethesda’s open-world RPG into a run-based dungeon crawler with random combat rooms, changing loadouts and more than 100 custom perks. Fallout 4 usually gives you a huge wasteland and lets you decide where to go next. This mod does something very different. It takes Bethesda’s open-world RPG and rebuilds it around short, unpredictable runs where every room matters. Created by modder Nethalythic with Fallout 4’s Creation Kit, the mod adds a dedicated roguelike mode built around randomly selected combat areas. You start with limited gear, move from room to room and deal with tougher enemies as the run goes on. It’s a much tighter setup than the normal Fallout 4 campaign. There’s less wandering and more pressure to make the equipment in front of you work.

Fallout 4, but with a completely different structure

Fallout 4 launched in 2015 and takes place in the Commonwealth, Bethesda’s post-apocalyptic version of Boston and the surrounding parts of Massachusetts. You play as the Sole Survivor, who leaves Vault 111 more than 200 years after a nuclear war and begins searching for a missing son. From there, the game opens up into a large RPG packed with factions, quests, abandoned buildings, underground facilities and plenty of radioactive wildlife.

Combat mixes standard first-person and third-person shooting with V.A.T.S., Fallout’s familiar targeting system. You can also modify weapons, build settlements, craft equipment and develop your character through a large perk system. This mod keeps many of those mechanics. It simply puts them into a very different format.

Each run starts with a random loadout

At the start of a run, you choose between three randomly generated loadouts. That sounds simple, but it immediately changes how you approach the next few rooms. You might get a setup that suits close-range fighting, while another run could push you towards rifles or another weapon type entirely.

You can’t rely on getting the same kit every time. From there, the mod sends you through randomly chosen combat rooms. Enemy difficulty rises as you make progress, so later encounters demand better gear and a stronger character build. It turns Fallout 4 into something much more focused. Instead of leaving an area when things get difficult, you keep moving forward and work with what the run gives you.

Jabo Juice controls your perk choices

One of the mod’s main systems revolves around an item called Jabo Juice. You can find it during a run or buy it when the opportunity comes up. Drink one and you’re offered three random perks to choose from. There are more than 100 custom perks in the pool.

That means character development works differently from regular Fallout 4. You aren’t simply saving points and choosing whatever perk fits a long-term plan. Instead, you pick from the options available at that moment and try to build something useful as the run develops.

Sometimes the choices will fit your weapons perfectly. Sometimes they won’t. That randomness is a big part of the format. Two runs can start in a similar way and then head in completely different directions depending on which perks appear.

Shops give you a chance to rebuild your setup

Shops appear between some combat sections, giving you a chance to spend resources before moving on. Their inventories can contain normal weapons, legendary gear, armour, crafting materials and aid items. That gives you a few decisions to make before the next fight. Do you spend on a stronger weapon now? Pick up healing supplies? Save resources and hope something better appears later?

Fallout 4’s existing legendary equipment system also fits neatly into this format. A weapon with the right effect can change how you approach the next few rooms without the mod needing to replace the game’s original combat mechanics.

Fallout 4 becomes a run-based dungeon crawler

The biggest change here isn’t a new weapon or a new quest. It’s the structure. The original Fallout 4 is built around exploration. You can spend hours scavenging buildings, following faction storylines, improving settlements or simply walking across the map to see what you find.

This mod compresses those systems into something much faster. You enter a run, pick a loadout, clear rooms, collect perks, buy equipment and deal with enemies that keep getting stronger. Then you do it again with a different combination of gear and upgrades.

It still looks and plays like Fallout 4. The guns, armour and familiar systems are still there. The difference is what the game asks you to do with them.

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