Enlarge / Just because you're still alive in a retro-futuristic-post-apocalyptic Commonwealth doesn't mean you're necessarily witty. (credit: Bethesda / ProfMajowski)

Modders can change many things inside their favorite games, but dialogue from professionally voiced characters hasn't been one of those things—at least until recently. AI voice generation could open up new modding avenues for some games, as it has already done with one Fallout 4 mod package.

Roleplayer's Expanded Dialogue (RED) is listed in the NexusMods catalog as a "Massive expansion of vanilla dialogue," adding more than 300 entirely new lines of dialogue to the game. Those lines aim to solve an issue near to the hearts of fans of Fallout 1, 2, and New Vegas: role-playing. If you're playing as a ruthless jerk, a brilliant nuclear scientist, or a strong but dimwitted dolt, you'll see more dialogue options that reflect this. Mechanically, the roll-the-dice speech "checks," which are based solely on your charisma level in the default game, can now be unlocked using related traits or skills.

If you're going to let a player be a cannibal, let them talk about it, too. (credit: Bethesda / ProjMajowski)

They're not just new labels on existing dialogue, either. RED, created by NexusMods user ProfMajowski (and first seen by us at PCGamesN), says it used ElevenLabs voice AI to generate its more in-character lines. The results can sometimes "sound a little 'emotionless,'" the creator writes, but "otherwise they basically sound like the real thing." Nothing your character can newly say now will change the game's mechanics or reactions, but it should sound a bit more in character.