Games like Walls of Rust
Games like Walls of Rust include Slay the Spire, Balatro, Monster Train, Slay the Spire 2, and Wildfrost. We matched them by the tags players give Walls of Rust on Steam (Turn-Based Tactics, Roguelike Deckbuilder, Grid-Based Movement, Card Battler, and Mechs): closest matches first, and among equally close ones the better-known games.

Slay the Spire
Shared: Roguelike Deckbuilder · Card Battler · Deckbuilding

Balatro
Shared: Roguelike Deckbuilder · Deckbuilding · Card Game

Monster Train
Shared: Card Battler · Turn-Based Tactics · Roguelite

Slay the Spire 2
Shared: Roguelike Deckbuilder · Deckbuilding · Card Battler

Wildfrost
Shared: Roguelike Deckbuilder · Card Battler · Turn-Based Tactics

StarVaders
Shared: Roguelike Deckbuilder · Turn-Based Tactics · Deckbuilding

Alina of the Arena
Shared: Roguelike Deckbuilder · Turn-Based Tactics · Hex Grid

As We Descend
Shared: Roguelike Deckbuilder · Card Battler · Turn-Based Tactics

LONESTAR
Shared: Turn-Based Tactics · Roguelike Deckbuilder · Card Battler

9 Kings
Shared: Roguelike Deckbuilder · Deckbuilding · Card Battler

Into the Breach
Shared: Turn-Based Tactics · Mechs · Pixel Graphics

Die in the Dungeon
Shared: Roguelike Deckbuilder · Card Battler · Turn-Based Combat

Mewgenics
Shared: Turn-Based Tactics · Roguelite · Turn-Based Combat

Dicey Dungeons
Shared: Roguelike Deckbuilder · Card Battler · Roguelite

Dream of Corpse Lady
Shared: Turn-Based Tactics · Card Battler · Roguelike Deckbuilder

Vampire Crawlers: The Turbo Wildcard from Vampire Survivors
Shared: Card Battler · Deckbuilding · Pixel Graphics

Marvels Midnight Suns Digital Edition
Shared: Turn-Based Tactics · Turn-Based Combat · Deckbuilding

Dice & Fold
Shared: Roguelike Deckbuilder · Card Battler · Turn-Based Combat

Cubic Cosmos
Shared: Roguelike Deckbuilder · Card Battler · Turn-Based Tactics

Circadian Dice
Shared: Roguelike Deckbuilder · Turn-Based Tactics · Card Battler

Touhou: Lost Branch of Legend
Shared: Roguelike Deckbuilder · Card Battler · Turn-Based Tactics

Fights in Tight Spaces
Shared: Turn-Based Tactics · Roguelike Deckbuilder · Turn-Based Combat

Shogun Showdown
Shared: Roguelike Deckbuilder · Turn-Based Tactics · Turn-Based Combat

Astrea: Six-Sided Oracles
Shared: Roguelike Deckbuilder · Card Battler · Turn-Based Combat