Shoot Many Robots, Ubisoft's co-op side-scrolling shooter, has a PC release date for Steam. The 6th April. It's been out on console downloads for a while now, and has garnered an extremely confusing mix of reviews. The super-angry Destructoid loved it with an 8, while the pathologically generous IGN broke their score machine by going as low as 4.5. So I don't know what to…