Cerulean Mod (1.21.1, 1.20.1) – Pick Up Items Without Lag
Cerulean Mod optimizes how Minecraft checks for advancements to help reduce lag. This is especially helpful in large modpacks where the game can slow down when you pick up many items. The mod is an updated fork of Icterine, with extra features to improve performance.
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Features:
- Reduces lag from advancement checks, particularly when you pick up items.
- Adds an option to process advancements every few ticks for better performance.
- Makes sure the first time you pick up an item, it is checked for achievements right away.
- Works with vanilla advancements and most other mods and datapacks.
- Lets you turn its features on or off in a config file.
- Runs entirely on the server-side and has no known conflicts with other mods.
Screenshots:










How to Install:
New to Minecraft? Follow our step-by-step guide to install Mods on your PC.View Guide
Requirements:
Cerulean Mod Download Links
For Minecraft 1.21.1, 1.21
Fabric Version: Download from Server 1 – Download from Server 2
NeoForge Version: Download from Server 1 – Download from Server 2
For Minecraft 1.20.1, 1.20
Forge Version: Download from Server 1 – Download from Server 2
Fabric Version: Download from Server 1 – Download from Server 2
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August 31, 2025
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