Modder Combines Fallout 3, Fallout: New Vegas, and Fallout 4 Into One Game With Multiplayer

The installation process turned out to be complicated.

Modder Cobalt recently unveiled a large project that lets players experience Fallout 3 and Fallout: New Vegas inside Fallout 4. Fallout 4 itself is also playable, and players can travel between the worlds at any time.

The modder is bringing equipment, weapons, unique items, creatures, and other elements from earlier games in the franchise into Fallout 4. Some mechanics have been adapted for the fourth game. For example, the modder said they “created a Pip-Boy map plugin that draws a route to the destination, as in the original Fallout 3, through the subway.”

The modder warned that some bugs may have been missed during testing:

This is a huge project I’ve been working on for a long time with a lot of love. We tested and fixed bugs in the main story, side quests, and DLC for both games, across several versions of Fallout 4 and different playthrough paths. We completed more than 10 full playthroughs. And it seems we’ve finally reached the point where the major bugs are fixed and all the games are quite stable and playable. But I imagine there are still some bugs somewhere.

The “Fallout 34 (Fallout 3 and NV in Fallout 4)” mod for Fallout 4 is available for free through Nexus Mods. The archive does not include game files; it is simply a converter that uses files provided by players.

To use the converter, players must install all the games in separate directories and then run the installer. According to the modder, the conversion process can take about two hours.

The installation process has put off some players. Dr_Nefario4, for example, said: “Looks like you need a PhD in troubleshooting bugs to get everything installed properly.”

Image source: Cobalt

An optional mod called “Fallout 34 Online” is also compatible with the project. It adds multiplayer features, letting players see and interact with others using the mod, as well as participate in online events. Local co-op is also available.

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