Karuba fits in the category of multiplayer solitaire with games like Take it Easy!, games that almost entirely live up to the "solitaire" in the description as each player has an individual game board and (almost) everything you do is on that board. You're racing to move adventurers on your team to temples on an island, and whoever gets to each temple first scores the most points — but you won't necessarily follow the same paths as anyone else to get there, and you'll likely be distracted by other treasures along the way...