Monster Train is described as 'Strategic roguelike deck-building game with a twist. Set on a train to hell, you’ll use tactical decision-making to defend multiple vertical battlegrounds. With real-time competitive multiplayer and endless replayability, Monster Train is always on time' and is a Card Game in the games category. There are four games similar to Monster Train for a variety of platforms, including Windows, Steam, Mac, Nintendo Switch and Linux apps. The best Monster Train alternative is Slay the Spire. Other Monster Train like games are Monster Slayers, Blood Card and SteamWorld Quest: Hand of Gilgamech.
Slay the Spire fuses card games and roguelikes together to make the best single player deckbuilder. Craft a unique deck, encounter bizarre creatures, discover relics of immense power, and Slay the Spire!
Monster Slayers is a rogue-like deck-building RPG adventure. Create a hero and choose your path through the perilous Northern Valley as you battle to become a true Monster Slayer.
Blood Card is a card game that combines elements of roguelike and deckbuilding. During the game, you shall strive ahead, gathering cards to build a unique deck and use it to defeat the enemies getting in your way.
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Despite the fact that Monster Train takes a lot from Slay the Spire, up to the UI layout, they are fundamentally different games. MT is more of Tower-of-defense genre, there's no place for complex combo and accurate calculation of numbers. However, if you aren't familiar with the CCG genre, MT may be a good starting point, it's a high-quality game, but after 30 o'clock you may want something more meaningful, and here Slay the Spire will be fit as much as possible.