Summary
One of the first Kickstarter success stories, The Banner Saga: Factions is the multiplayer portion of a Viking-themed game.
The gameplay involves building a team of 6 characters (each of a specific class type with its own abilities) and participating in turn-based tactical battles against an opponent online.
Performance & Quality
The Mac OS X version of the game has had some issues, notably with the Steam overlay not working properly (which actually prevents the in-game store from working).