Games like Tank Survivor
Games like Tank Survivor include Balatro, Emberward, 20 Minutes Till Dawn, They Are Billions, and Slay the Spire. We matched them by the tags players give Tank Survivor on Steam (Tower Defense, Base Building, Shoot 'Em Up, Deckbuilding, and 2.5D): closest matches first, and among equally close ones the better-known games.

Balatro
Shared: Deckbuilding · Singleplayer · Card Game

Emberward
Shared: Tower Defense · Base Building · Deckbuilding

20 Minutes Till Dawn
Shared: Shoot 'Em Up · Roguelite · Survival

They Are Billions
Shared: Base Building · Tower Defense · Survival

Slay the Spire
Shared: Deckbuilding · Card Game · Singleplayer

Kingdom Two Crowns
Shared: Tower Defense · Base Building · Singleplayer

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

Kingdom: New Lands
Shared: Tower Defense · Base Building · Survival

Slay the Spire 2
Shared: Deckbuilding · Card Game · Strategy

Stacklands
Shared: Roguelite · Survival · Card Game

Bloons TD 6
Shared: Tower Defense · Singleplayer · Strategy

RimWorld
Shared: Base Building · Survival · Singleplayer

Cult of the Lamb
Shared: Base Building · Singleplayer · Roguelite

Heretic's Fork
Shared: Tower Defense · Deckbuilding · Roguelite

The Riftbreaker
Shared: Base Building · Tower Defense · Survival

This War of Mine
Shared: Survival · Base Building · Singleplayer

Rise to Ruins
Shared: Tower Defense · Base Building · Survival

Rogue Tower
Shared: Tower Defense · Base Building · Roguelite

Oxygen Not Included
Shared: Base Building · Survival · Singleplayer

Ratropolis
Shared: Deckbuilding · Roguelite · Singleplayer

Creeper World 3: Arc Eternal
Shared: Tower Defense · Base Building · Singleplayer

Dungeon Defenders
Shared: Tower Defense · Singleplayer · Survival

Nordhold
Shared: Tower Defense · Roguelite · Base Building

Tower Dominion
Shared: Tower Defense · Base Building · Roguelite