Games like Endless Tower Survivors
Games like Endless Tower Survivors include Megabonk, Thronefall, Vampire Survivors, Bloons TD 6, and 20 Minutes Till Dawn. We matched them by the tags players give Endless Tower Survivors on Steam (Strategy, Action, Auto Battler, Tower Defense, and Action Roguelike): closest matches first, and among equally close ones the better-known games.

Megabonk
Shared: Action Roguelike · Action · Bullet Hell

Thronefall
Shared: Strategy · Tower Defense · Action

Vampire Survivors
Shared: Action Roguelike · Bullet Hell · Action

Bloons TD 6
Shared: Strategy · Tower Defense · 3D

20 Minutes Till Dawn
Shared: Action Roguelike · Bullet Hell · Survival

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

Dungeon Defenders
Shared: Strategy · Tower Defense · Survival

Orcs Must Die! 3
Shared: Strategy · Tower Defense · Action

Bad North: Jotunn Edition
Shared: Tower Defense · Action Roguelike · Survival

GemCraft - Chasing Shadows
Shared: Strategy · Tower Defense · Action

Kingdom Rush - Tower Defense
Shared: Strategy · Tower Defense · Action

Orcs Must Die!
Shared: Action · Strategy · Tower Defense

Brotato
Shared: Action Roguelike · Bullet Hell · Survival

Poly TD
Shared: Auto Battler · Tower Defense · Strategy

Northend Tower Defense
Shared: Strategy · Tower Defense · Auto Battler

Hades
Shared: Action Roguelike · Action · Indie

Necrosmith
Shared: Tower Defense · Action Roguelike · Strategy

Orcs Must Die! 2
Shared: Action · Strategy · Tower Defense

Enter the Gungeon
Shared: Action Roguelike · Bullet Hell · Indie

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

Sanctum 2
Shared: Strategy · Tower Defense · Action

Aliens: Dark Descent
Shared: Strategy · Action · Tactical

Monsters are Coming!
Shared: Action · Tower Defense · Action Roguelike

PUBG: BATTLEGROUNDS
Shared: Survival · Action · Strategy