Games like The Wall Mustn't Fall
Games like The Wall Mustn't Fall include Plants vs. Zombies GOTY Edition, Zero Stress King: Idle Defense, Bloons TD 6, Megabonk, and Maktala: Slime Lootfest. We matched them by the tags players give The Wall Mustn't Fall on Steam (Tower Defense, Auto Battler, Inventory Management, Strategy, and Roguelite): closest matches first, and among equally close ones the better-known games.

Plants vs. Zombies GOTY Edition
Shared: Tower Defense · Strategy · Casual

Zero Stress King: Idle Defense
Shared: Tower Defense · Auto Battler · Strategy

Bloons TD 6
Shared: Tower Defense · Strategy · Casual

Megabonk
Shared: Roguelite · Action Roguelike · Loot

Maktala: Slime Lootfest
Shared: Incremental · Auto Battler · Loot

Backpack Battles
Shared: Auto Battler · Inventory Management · Strategy

Kingdom Rush - Tower Defense
Shared: Tower Defense · Strategy · 2D

Risk of Rain 2
Shared: Roguelite · Action Roguelike · Loot

Bills Must Be Paid
Shared: Roguelite · Strategy · Incremental

Vampire Survivors
Shared: Roguelite · Action Roguelike · 2D

Idle Champions of the Forgotten Realms
Shared: Strategy · Idler · Incremental

Dragon Cliff
Shared: Strategy · Incremental · Loot

Firestone – Idle Clicker Online RPG
Shared: Auto Battler · Incremental · Idler

Desktop Defender
Shared: Auto Battler · Tower Defense · Incremental

(the) Gnorp Apologue
Shared: Strategy · Incremental · Idler

Samawa Idle
Shared: Auto Battler · Tower Defense · Roguelite

Cookie Clicker
Shared: Incremental · Idler · Casual

Legion TD 2 - Multiplayer Tower Defense
Shared: Tower Defense · Auto Battler · Strategy

Sir, We Have an Orc Problem
Shared: Tower Defense · Roguelite · Incremental

Bloons TD 5
Shared: Tower Defense · Strategy · Action

Book of Yog Idle RPG
Shared: Auto Battler · Loot · Strategy

PUBG: BATTLEGROUNDS
Shared: Shooter · Survival · Strategy

Zad Archery
Shared: Incremental · Roguelite · Loot

Bad North: Jotunn Edition
Shared: Tower Defense · Auto Battler · Action Roguelike