Games like Frostrain 2
Games like Frostrain 2 include Balatro, Slay the Spire 2, Slay the Spire, Luck be a Landlord, and RACCOIN: Coin Pusher Roguelike. We matched them by the tags players give Frostrain 2 on Steam (Strategy, Roguelike Deckbuilder, Trains, Deckbuilding, and Simulation): closest matches first, and among equally close ones the better-known games.

Balatro
Shared: Roguelike Deckbuilder · Strategy · Deckbuilding

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

Slay the Spire
Shared: Roguelike Deckbuilder · Strategy · Deckbuilding

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

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

Monster Train 2
Shared: Roguelike Deckbuilder · Strategy · Deckbuilding

9 Kings
Shared: Strategy · Roguelike Deckbuilder · Deckbuilding

Transport Fever 2
Shared: Strategy · Simulation · Trains

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

Aotenjo: Infinite Hands
Shared: Strategy · Roguelike Deckbuilder · Deckbuilding

Mini Metro
Shared: Strategy · Trains · Simulation

Game Dev Tycoon
Shared: Strategy · Simulation · Management

Dicey Dungeons
Shared: Roguelike Deckbuilder · Deckbuilding · Strategy

Plague Inc: Evolved
Shared: Strategy · Simulation · Indie

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

This War of Mine
Shared: Strategy · Simulation · Post-apocalyptic

911 Operator
Shared: Strategy · Simulation · Management

Super Fantasy Kingdom
Shared: Strategy · Roguelike · Roguelike Deckbuilder

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

Loop Hero
Shared: Deckbuilding · Roguelike · Indie

Frostpunk 2
Shared: Strategy · Simulation · Post-apocalyptic

Frostpunk
Shared: Strategy · Post-apocalyptic · Simulation

Cat God Ranch
Shared: Roguelike Deckbuilder · Simulation · Deckbuilding

DICEOMANCER
Shared: Strategy · Roguelike Deckbuilder · Deckbuilding