Games like Million Monster Militia
Games like Million Monster Militia include Balatro, Slay the Spire 2, Luck be a Landlord, 9 Kings, and Monster Train. We matched them by the tags players give Million Monster Militia on Steam (Roguelike Deckbuilder, Deckbuilding, Auto Battler, Strategy, and Roguelite): closest matches first, and among equally close ones the better-known games.

Balatro
Shared: Roguelike Deckbuilder · Deckbuilding · Roguelike

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

Luck be a Landlord
Shared: Roguelike Deckbuilder · Deckbuilding · Strategy

9 Kings
Shared: Strategy · Auto Battler · Deckbuilding

Monster Train
Shared: Deckbuilding · Roguelite · Roguelike

Slay the Spire
Shared: Roguelike Deckbuilder · Deckbuilding · Roguelike

RACCOIN: Coin Pusher Roguelike
Shared: Deckbuilding · Roguelike Deckbuilder · Strategy

Super Fantasy Kingdom
Shared: Strategy · Auto Battler · Roguelike

Hadean Tactics
Shared: Roguelike Deckbuilder · Auto Battler · Deckbuilding

Monster Train 2
Shared: Roguelike Deckbuilder · Deckbuilding · Roguelike

LONESTAR
Shared: Strategy · Roguelike Deckbuilder · Roguelike

He is Coming
Shared: Strategy · Auto Battler · Roguelike

Shogun Showdown
Shared: Roguelike Deckbuilder · Roguelike · Strategy

Die in the Dungeon
Shared: Deckbuilding · Strategy · Roguelike Deckbuilder

As We Descend
Shared: Roguelike Deckbuilder · Deckbuilding · Roguelike

Wildfrost
Shared: Roguelike Deckbuilder · Deckbuilding · Roguelite

StarVaders
Shared: Roguelike Deckbuilder · Deckbuilding · Roguelite

Dicefolk
Shared: Roguelike Deckbuilder · Roguelike · Roguelite

Alina of the Arena
Shared: Roguelike Deckbuilder · Roguelike · Roguelite

Fights in Tight Spaces
Shared: Deckbuilding · Strategy · Roguelike Deckbuilder

Dicey Dungeons
Shared: Roguelike Deckbuilder · Deckbuilding · Roguelite

Into the Breach
Shared: Strategy · Turn-Based Strategy · Roguelike

Dungeons & Degenerate Gamblers
Shared: Roguelike Deckbuilder · Strategy · Deckbuilding

Vault of the Void
Shared: Roguelike Deckbuilder · Deckbuilding · Strategy