Your survival abilities will now be rewarded. Here are all the exfil streak bonuses and discounts for the new Containment Levels mechanic in Modern Warfare 3 Zombies. All Exfil Streak Containment Level bonuses in Modern Warfare Zombies To exfil out of a round of zombie killing in Modern Warfare Zombies is a feat on its own‚ especially if you have already dealt with all the most powerful zombies in the High-Threat area and even the Dark Aether Rift. Well‚ apparently the devs noticed our efforts to survive a zombie apocalypse and now they have introduced a new tiered system called Containment Levels. This system works as follows: every time you successfully exfil out of Urzikstan‚ you will gain a Containment Level. There are a total of 100 levels that are spanned across 10 different tiers‚ which each exfil adding to your streak. Every time you reach a new tier‚ you will get a starting reward for the next time you venture into a Zombies match. If you are killed and cannot exfil s...