The patch forces the Mystery Box to spawn at a specific, optimized location every time the game starts.
Prior to the patch, high-round strategies often revolved around "resetting" the game if the first box did not yield a Ray Gun, allowing players to start their "train" (grouping zombies) immediately with maximum firepower. Post-patch, players were forced to adapt to the "Two-Box" meta. Players now had to conserve enough points to open the box a second time (costing 950 points x 2 = 1900 points, plus door costs) to have a chance at the Ray Gun. bo2 first box patch