Laboratory

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The Laboratory is a new feature introduced in Metal Slug Attack as part of its 4.0.0 update. In order to unlock this feature, the player must be level 20 or higher.

Overview

As the name suggests, the laboratory is a place for players to test out anything they want; be it a specific unit, deck setup or play for fun.

Both the player and the AI are given an empty deck template that allows them to place up ten units of their choosing, which can be accessed by selecting the "Deck Setting" option. Units in the lineup are automatically selected from the most recent to the oldest units, but this may be changed to the player's liking from the sorting feature.

Any unit selected from the lineup will have maximum parameters; a platnium frame, maximum stacks of all Status Strengthening Items applicable to the unit and are fully equipped.

The player also has the option to automatically fill the deck template with a deck of their own from Build Up, which copies the player's deck into the template.

Deck Customization

A unit can be manually selected in order to change some of its parameters, such as its frame, status strengthening items, skill equip items and skill sets. The items themselves can be added or removed to the player's liking.

An option called "Own Unit" at the top left of a selected unit can be tapped on, which will give a confirmation message stating that the unit's parameters will be adjusted to the player's own. If the player doesn't own the unit, then no change is applied.

Bundle

Simultaneously change the parameters and settings of all units of either decks. Keep in mind that for the bundle option that allows the player to enhance the parameters of all units to the currently possessed ones, if the player doesn't own one of the units in the deck or has not unlocked some of its status or skills yet, the changes will not apply.

• Fully enhance all parameters for a unit (Sets the units' level, evolution frame, etc. to the max level)
• Set to same parameters as currently possessed Units (Set the units' level, evolution frame, etc. to same variables as the ones that the player currently)
• Enhance only a unit's level to its maximum (Places the units' level to 50)
• Make only the unit level the same as a possessed unit (The units' level will be set the same as the ones that the player currently owned)
• Enhance only evolution level to its maximum (The units' evolution frame will be set to platinum frame)
• Sets only evolution level to the same as a possessed unit (The units' evolution frame will be the same as the ones that the player currently owned)
• Release all skills (The units' skills will be released)
• Set skills to the same as the possessed unit (The units' skills will be released to the same skills as the ones that the player currently owned)
• Release all skills, and enhance unit to maximum level (All of the units' skills will be set to level 50)
• Set only skill level to the same as a possessed unit (The units' skill levels will set the same as the ones that the player currently owned)
• Only status strengthening level will be enhanced to max (The units' Status Strengthening items will be upgraded to level 10)
• Only status strengthening level will be equal to owned units (The units' Status Strengthening items will be upgraded to the same levels as the ones that the player currently owned)

Record

Shows the battle history between the player's deck and CPU deck. The record show the player's deck and the CPU deck's units' performance. It resembles the Online or Rank Match records.

Base Level

Allows the selection of either decks' base level to the max level or the player's current base level.

Support System

Allows selection of either own deck or enemy deck's support system. (Metal Slug Attack, Recovery, Reload)

Stages

The laboratory offers multiple stages that can be used for testing. Only three of the maps offered in Laboratory are used in PvP activities and it is recommended units be tested on these stages for no bias.