Triplicity Windows, Mac, Linux game

Triplicity is a minimal, fast-paced collectible card game in an unfolding world of puzzles.

You are given a starting deck of cards and progress through the game by solving puzzles and challenging NPC card game players. There is also a card house where practice matches and tournaments can be played.

You earn new cards after every match, and can build custom decks. Cards also have a probability of having special attribute bonuses and abilities. The idea is to make sure getting new cards stays exciting, even lower tiered cards can become great cards with a bonus. Another goal is to provide some uniqueness to each deck and prevent meta-strategy stagnation.

There are 9 puzzle worlds in total, each with 3 NPCs that must be defeated to proceed.

There are "multiplayer" daily tournaments. "Multiplayer" is in quotes because you don't play against another player live. Instead players can submit a deck to the daily tournament pool. Players can then challenge the pool as many times as desired, playing against decks that other users created. The opposing decks are played by the games AI. There are leader boards for user with the best record challenging the daily pool and best record of a submitted deck.

The puzzle are not meant to be super challenging, though there are a few tricky ones, especially later on in the game. I would say it is accessible to all players.