IdleOn - Idle RPG: Laboratory Mainframe Setup and Priority Guide

To optimize the World 4 Laboratory in IdleOn - Idle RPG, place characters into mainframe test tubes to build an unbroken connection line from the left console across the board. Your primary objective is expanding Line Width so fewer characters are locked into tubes, freeing the rest of your roster for active combat and gathering. Route your connection directly toward the 3D printer doubling node and Killer's Brightside first to secure the largest account-wide production gains.

How Mainframe Connections Work

Mainframe power operates strictly as a daisy chain originating from the console on the far left. Energy travels horizontally toward the right side of the screen through the reach radius of each stationed character. If any gap appears between characters, the connection breaks immediately. A broken circuit deactivates every downstream node and jewel regardless of how many characters occupy tubes further to the right.

Characters placed in test tubes earn continuous Laboratory experience, but they cannot perform active combat, mine, chop, or run town tasks. Because locked characters sacrifice active map progression, you must minimize the number of characters required to sustain your circuit. Position characters so their reach boundaries barely overlap, covering maximum horizontal distance per slot.

How to Increase Line Width

Line Width determines the pixel radius of the circle surrounding a character in a tube. Higher reach spans larger gaps between characters, reducing the total roster commitment needed to touch distant nodes.

To expand Line Width efficiently, take the following steps:

1. Equip dedicated gear before slotting characters: Craft Lab Scrubs, Lab Shoes, and Souped Tube Rings. Equipping these items on characters before placing them into tubes often bridges gaps that would otherwise require an additional party member.
2. Upgrade account-wide alchemy and stamps: Invest in reach-focused stamps at the World 4 stamp station and unlock relevant blue and purple cauldron alchemy bonuses. These upgrades apply globally to every character on your account.
3. Target reach meals in the kitchen: Direct your cooking tables toward recipes that provide multiplicative bonuses to Laboratory reach and skill experience.

High-Priority Mainframe Nodes

Path your connection line directly toward economic and combat multipliers before diverting reach toward minor utility bonuses.

• 3D Printer Doubling Node: Prioritize this node above all others. Activating it doubles your active 3D printer output, multiplying resource generation for construction, alchemy, and refinery production.
• Refinery Cycle Nodes: Connect nodes that accelerate refinery speeds to keep automated production pipelines running without resource shortages.
• Killer's Brightside: This combat node doubles monster kill credit across all worlds. It cuts portal unlock requirements in half and doubles your accumulation speed for Death Note tiers, rapidly scaling account damage and drop rates.

If your current Line Width cannot sustain every node on the board, keep the printer doubler and Killer's Brightside powered while leaving late-board utility nodes disconnected until your stats improve.

Activating Mainframe Jewels

Mainframe jewels provide massive stat boosts and amplify all adjacent nodes within their boundary, but they require two conditions to function:

1. Connection contact: The physical reach circle of a slotted character must touch the jewel's hitbox.
2. Account milestone requirements: Each jewel requires a specific threshold to be met before lighting up, such as total account combat levels, cumulative gathering levels, or designated resource quantities in your storage chest.

A jewel connected to the power line provides zero benefits if its account requirements remain unfulfilled. Align your highest-width characters so their reach circles clip both an active jewel and adjacent high-priority nodes to compound the stat bonuses of the entire circuit.

Accelerating Progress with Bubonic Conjuror and Chips

The Laboratory console contains sockets for specialized Chips that modify individual characters with combat, skilling, and printer perks. Sockets unlock sequentially as a character's personal Laboratory level increases. Buy chips weekly using spices from World 4 Breeding alongside monster drop materials. Prioritize chips that duplicate active cards, expand base printer sample sizes, or grant extra star sign slots.

To speed up the Laboratory leveling process across your entire account, place a Bubonic Conjuror inside the mainframe. This class features two dedicated Laboratory talents:

• Upload Style: Substantially increases the base Laboratory experience earned by the Bubonic Conjuror while stationed in a tube.
• Sharing Some Sparks: Transfers a percentage of the Bubonic Conjuror's earned Laboratory experience to all other characters currently connected to the mainframe.

Using a Bubonic Conjuror as an anchor inside the tubes rapidly levels your inactive roster, expanding their base reach circles and unlocking chip sockets so you can unplug frontline combat characters sooner.