From the website:
Star Realms aims to create a direct conflict game that feels a lot like a CCG, but is played out of a single box retailing for $15. Star Realms is designed by two former Magic: The Gathering pros and Hall of Fame members, Robert Dougherty and Darwin Castle and published by White Wizard Games. At its heart, Star Realms is a deck builder. However, there are no bosses to attack or super villains to team up against. The focus is player-vs-player combat, and the last man standing wins.
Star Realms is a 2-player game that plays in about 20 minutes. There are multiplayer variants that require additional copies of the game.