BL3 TrueFastball - Borderlands 2-Style Fastball

TrueFastball - Borderlands 2-Style Fastball

TrueFastball makes the Fastball grenade in Borderlands 3 hit harder and feel more responsive, bringing its impact closer to Borderlands 2 while deliberately keeping Borderlands 3's native Fastball projectile speed and trajectory.

The mod applies only to the Fastball. It multiplies the already-computed runtime GrenadeDamage so native level and Mayhem scaling remain intact, and temporarily accelerates the tested grenade throw animation only for a Fastball throw.

FEATURES

• Fastball-only damage modification.

• Default Fastball Damage Multiplier: 2. 56.

• Multiplies runtime GrenadeDamage instead of replacing it with a fixed value.

• Preserves native level and Mayhem scaling.

• Default Throw Animation RateScale: 2. 0.

• Both values are configurable from the in-game Mod Menu.

• Invalid or manually edited settings are validated before use.

• Temporary throw-animation changes are restored after the owning grenade action ends.

• Does not modify Fastball projectile speed.

• Does not modify projectile gravity, upward velocity or trajectory.

• Normal successful use does not spam the SDK console.

REQUIREMENTS

• Borderlands 3

• BL-SDK / Oak Mod Manager 1. 11+

• Mods Base 1. 12+

• BL3 Mod Menu 1. 8+

Latest BL-SDK / Oak Mod Manager:

https://github.com/bl-sdk/oak-mod-manager/releases/latest

Official BL3 SDK installation guide:

https://bl-sdk.github.io/oak-mod-db/

INSTALLATION

1. Intstall latest BL-SDK / Oak Mod Manager

https://github.com/bl-sdk/oak-mod-manager/releases/latest

2. Download the main mod archive from the Files tab.

3. Extract TrueFastball.sdkmod from the downloaded archive.

4. Copy TrueFastball.sdkmod to:

Borderlands 3\sdk_mods\

5. Do not extract TrueFastball.sdkmod itself.

6. Start Borderlands 3.

7. Open the PythonSDK / Mods menu.

8. Enable TrueFastball.

9. Open the TrueFastball settings and adjust the two values if desired.

Updating TrueFastball:

1. Fully close Borderlands 3.

2. Download the latest version of TrueFastball.

3. Replace the existing TrueFastball.sdkmod in:

Borderlands 3\sdk_mods\

with the new file.

4. Do not extract the .sdkmod file.

5. Start Borderlands 3 again.

CONFIGURATION

The default values are the tested release settings and normally do not need to be changed.

Fastball Damage Multiplier: 2. 56

Throw Animation RateScale: 2. 0

Available ranges:

Fastball Damage Multiplier: 1. 00 - 4. 00

Damage slider step: 0. 01

Throw Animation RateScale: 1. 0 - 5. 0

Throw Rate slider step: 0. 1

The damage multiplier is applied to the already-computed runtime GrenadeDamage, preserving the game's native level and Mayhem scaling.

TrueFastball intentionally does not alter Fastball projectile speed, gravity or trajectory.

COMPATIBILITY

The damage multiplier applies only to Fastball grenades.

The current throw-animation acceleration targets the tested FL4K / Beastmaster grenade animation assets.

The Fastball damage change itself is not limited to FL4K.

Coop Support: Unknown

AI DISCLOSURE

The Python code for this mod was generated with OpenAI GPT-5. 6 Sol through an iterative research, development and debugging process.

In-game testing, behavior verification and QA were performed by Last1SiN.

This Nexus Mods page description was also generated with AI assistance.

No third-party mod code or game assets are bundled with the mod. BL-SDK / Oak components are external requirements.

CREDITS

Development: Sol / GPT-5. 6 Sol

Design, testing & QA: Last1SiN

BL3 PythonSDK / Oak Mod Manager:

apple1417 and the BL-SDK project contributors

SHOUTOUTS

Borderlands community

1. 0 — Initial release

• Added Fastball-only runtime damage scaling.

• Added a tested default Fastball Damage Multiplier of 2. 56.

• Preserved native level and Mayhem damage scaling by multiplying runtime GrenadeDamage.

• Added configurable Fastball throw animation RateScale with a default of 2. 0.

• Added Mod Menu controls for both release settings.

• Added runtime validation for manually edited or otherwise invalid settings.

• Added temporary owner-scoped throw-animation patching and restore behavior.

• Kept Borderlands 3 Fastball projectile speed, gravity and trajectory unchanged.