This week's Steam Weekend Deal puts SPAZ: Space Pirates And Zombies at 60% off, or $3.99. SPAZ is an indie title that mixes the elements of the 4X space sim genre--resource collection, exploration, fleet building--with the gameplay of classic arcade shooters like Asteroids and Geometry Wars. All of this is wrapped in modern graphics and physics. The game has gotten some very positive reviews, and at a discount price it certainly warrants the attention of 4X and arcade shooter fans alike.