Battle Train is part of the Turn Based Carnival going on right now here on Steam. One of the other games you'll find there is Mori Carta, which is a unique take on a deck-based card game.
From the Dev:
Mori Carta is the first "Handless" deckbuilding roguelike. Each of over 1000 cards represents a dynamic decision. Learning how to build and play 5 archetypes against over 185 uniquely challenging enemies will brutally test your skills. Join powerful companions into your strategy after first aiding them in their poetic and epic journeys.
Try our free discoverably deep demo on Steam!
When I tried it out, I was honestly intrigued by how the encounters work. Your own deck contains cards that represent the situation you're dealing with and the skills you bring to bear, and each card has an option to be played to the left or right, with different energy costs and different impacts based on where you play the card. For instance, for an ability card, you could play it to the left to expend some energy and deal damage, or you can play it to the right and gain energy while upgrading the card, so that when the card gets shuffled back into your deck it will be more powerful. Each encounter becomes a puzzle on how best to manage the deck you have, choosing which cards to expend energy for, which cards to upgrade, and where you can afford to accept the negative consequences for a card.
Fans of table top card games will find the mechanic easy to grasp and fun to play. If you give it a try, let us know what you think!