Metal Slug Defense Wiki
Metal Slug Defense Wiki

World One is the easier World in MSD and it is the first accesible world for starters.

Unlocking Stages

In this world are 2 types of stages: 12 Normal Stages and 4 Boss Stages.

To unlock all the normal Stages you can Buy the "Unlock All Stages on World 1" Bonus or by completing all the levels on a stage. It will unlock the next.

To Unlock the Boss Stages, you must complete them in order, they are unlocked at 6 a.m., 12 p.m., 6 p.m., and 10 p.m.  

The hardest Difficluty level found here is Very Hard.


This world is unlocked for your first experience. Here's what you do first:

  • Try and adapt each units' "Special Attack". These will turn the tide of the battle during your first try.
  • Your first unit, the Soldier is useful for releasing items and possible POW hidden in the map.
  • Don't be discouraged if you've lost in any given level. Try and earn more MSP by playing earlier levels to upgrade your units and your home base.
  • Upgrade the MSP Gain Level in the home customize section. This will increase your MSP gained from defeating a level.
  • Upgrade your units if you need complete a level without using items.
  • Try sticking to one faction, as you get a health boost
  • use your medals wisely. for example, don't get rebel infantry, W.rebel ininfantry is way stronger
  • try getting a powerful unit like Iron Nokana mkII by the end of this world, as this stronger unit will be pivotal in most stages. Go for AP ranges of 250-500 for your first, because your economy is still not that good.