The Wall Musn't Fall is a game about surviving an onslaught of enemies through the strategic decisions that you've made. You start off by selecting a hero with unique abilities. As you successfully defend, you are able to recruit ai controlled allies which you can level up by making subsequent purchases of the same ally or using an item or perk that will give them experience. Leveling up your allies will grant them stat bonuses and a new ability. You can gain synergetic bonuses by having a certain number of the same class of unit.

There are different weapons that serve different purposes and while any unit can equip any weapon, some weapons may make more sense on certain units. Later weapons begin to appear with slots, which you can insert gun mods into to give the weapon a stat boost or an effect.

Gameplay

Defend

• Shoot at enemies by left clicking on the mouse.
  
• Use your active items and abilities by pushing the hotkey on the keyboard.
  
• Alternatively, enable auto pilot and your hero will be controlled automatically just like your allies.

Shop

• Recruit new allies. Try to synergize.
  
• Purchase new weapons and items.
  
• Distribute weapons and relics to your allies.
  
• Choose your team's formation to optimize your synergies and abilities.
  
• Upgrade your shop and castle.

Permanent Upgrades

• Use the currency you acquired during the run to unlock permanent upgrades.
  
• Currently 28 permanent upgrades.