CurseForge · Minecraft mod
High Speed Library
A library mod that adds several elements inspired by ULTRAKILL
Quick answer
Which High Speed Library release should I use?
High Speed Library highspeedlib-1.21.1-1.0.1.jar targets 1.21.1 with NeoForge. The project page does not say whether this file belongs on the client, dedicated server, or both. All 1 required mods have matching files.
Where it goes
Is High Speed Library required on the client, server, or both?
The project page does not say whether this file belongs on the client, dedicated server, or both.
The source does not explicitly classify this release as client-only or server-only.
What else does High Speed Library highspeedlib-1.21.1-1.0.1.jar need?
highspeedlib-1.21.1-1.0.1.jar. Change the file and its required mods may change too.
Install Curios API first. We found matching files for this game-version and loader setup.
We only count dependency files that match this setup. A file for another loader does not fill the gap.
Before you install it
Add High Speed Library without breaking your instance.
Built for High Speed Library highspeedlib-1.21.1-1.0.1.jar. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use highspeedlib-1.21.1-1.0.1.jar. It targets 1.21.1 with NeoForge; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
Install Curios API first. We found matching files for this game-version and loader setup.
- 03
Put it on the correct side
The project page does not say whether this file belongs on the client, dedicated server, or both.
- 04
Pick the file you checked
Use the “Get this file” button beside highspeedlib-1.21.1-1.0.1.jar. It opens that exact file at the source.
About this project
What does High Speed Library add?
HighSpeedLib is a library and framework mod designed to bring high-octane, stylish action mechanics—heavily inspired by the fast-paced gameplay of ULTRAKILL—into the Minecraft environment. It provides a robust foundation for high-speed movement, technical combat, and advanced entity state management.
While serving as a library for other mods, it also implements several core mechanics that fundamentally change the player's movement and combat capabilities.
Key Features
1. Advanced Movement System
HighSpeedLib introduces a fluid mobility suite that transcends standard Minecraft movement:
- Dashing: Perform a quick burst of speed with built-in invulnerability frames (i-frames). This consumes stamina, which regenerates over time.
- Sliding: Maintain momentum while lowering your profile, allowing for fast traversal and dodging.
- Slamming: Perform a powerful ground-pound from mid-air, dealing damage to nearby entities upon impact.
- Wall Jumping: Kick off vertical surfaces to maintain height and chain movement combos.
2. Technical Combat Mechanics
The mod introduces technical depth to combat encounters:
- Parrying: A timing-based defensive mechanic. Successfully parrying an attack negates damage and can trigger various rewards or counter-attacks.
- Whiplash: A versatile hookshot system. Use it to pull smaller enemies toward you or propel yourself toward larger targets and fixed points.
- Arm Switching: Toggle between different arm types (e.g., Feedbacker and Knuckleblaster) to change your primary interaction and utility modes.
- Custom HUD: A dedicated "Ultra HUD" displays essential resources such as coin stocks and stamina in a stylish, non-intrusive format.
4. Mob Scaling and Attributes
- Radiance and Enrage: A framework to buff entities with increased health, damage, and speed, complete with visual indicators.
- New Attributes: Adds custom attributes to the game, such as Punch Damage and Slam Damage, allowing for fine-tuned character progression.
Items and Equipment
- Machine Wings: A signature back-slot item that integrates with the Curios API, visually representing the player's enhanced mobility.
- Stamina Boost Enchantment: A new enchantment for leggings that increases the player's maximum stamina capacity.
Developer API
HighSpeedLib is designed with extensibility in mind for modders:
- IParryable: Implement this interface on your entities or projectiles to make them interactable with the parry system.
- IHighSpeedInteractable: Define custom reactions when an entity is hit by a punch or a Whiplash hook.
- Player State Management: Easily access and modify complex player states (movement, combat, and abilities) through the
PlayerStateManager.
Project description from CurseForge.
Pick your setup
High Speed Library by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
1.21.1
1 loader build1.20.1
1 loader buildCheck the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
High Speed Library versions and loaders
highspeedlib-1.21.1-1.0.1.jar
30 Aug 2026
highspeedlib-1.21.1-1.0.0.jar
29 Aug 2026
highspeedlib-1.0.5.jar
13 Jun 2026
highspeedlib-1.0.4.jar
22 May 2026
highspeedlib-1.0.3.jar
21 May 2026
highspeedlib-1.0.2.jar
14 May 2026
highspeedlib-1.0.1.jar
4 May 2026
Looking for an older file? The official CurseForge project page is in Resources.