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The operation and maintenance of really big guns - miniguns, rocket launchers, flamethrowers and such.— In-game description

Big Guns is a skill in Fallout, Fallout 2, Fallout 3, and Fallout Tactics. In Fallout: Brotherhood of Steel, Big Guns is not a skill but there are big guns in the game. It was going to appear as a weapon skill in Fallout: Brotherhood of Steel 2, the equivalent of skills in other Fallout games. Big Guns determines combat effectiveness with any weapon categorized as a "Big Gun," such as flamers, miniguns, missile launchers, Fat Man, etc.

In Fallout: New Vegas, it was merged with Small Guns into a more general Guns skill, similar to the canceled Van Buren, which would have merged the skills into the Firearms skill.

Fallout

Example: A starting Agility of 5.

The Strength requirements of most big guns, combined with the weight of the guns themselves and the large amounts of ammunition they require make investing into Strength points at character creation a prudent choice for players planning to use these weapons as their mainstays. Most, if not all, big guns in Fallout are burst weapons exclusively, meaning that players cannot make targeted attacks with them. This makes taking the Fast Shot trait a much more viable option for big gun enthusiasts, as they enjoy the benefits of the trait without the drawback.

Affected weapons

Fallout 2 and Fallout Tactics

Example: A starting Agility of 5.

As with Fallout, Big Guns operates in much the same way in Fallout 2 and Fallout Tactics.

Affected weapons

Fallout 2
Fallout Tactics

Fallout 3

"The best way to win an argument is to be the loudest."

Example: A starting Endurance of 5 and Luck of 5.

As this skill increases, so does the accuracy and damage with all of these weapons, both in and out of V.A.T.S. mode.

Ways to increase Big Guns skill

Permanent
Temporary

Affected weapons

Fallout: Brotherhood of Steel

While the game does not have the ability to increase the effectiveness of big guns, there are some weapons that are listed as such.

Affected weapons

Fallout: Brotherhood of Steel 2

Big Guns was going to appear as a weapon skill. It increases the base damage inflicted by big guns.[1] Assuming Fallout: Brotherhood of Steel 2 would have used a points based system like its predecessor, it is able to be increased.

Big Guns is available to all but one player character, Lilith is incapable of using big guns thus has no use for this weapon skill.[2]

Notes

According to the Vault Dweller's memoirs, they canonically used a big gun to destroy the vats of FEV and kill the Master in the original Fallout. In his own words, "None could stand in my way. I had a mission. I had a goal. I had a really large gun."

References

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