The month-long Critical Countdown event in Modern Warfare 3 tasks you with collecting various types of DNA samples across multiplayer, Zombies and Warzone. We will explain the best way to collect the DNA samples quickly so that you can get the rewards faster.
How to farm DNA samples fast in MW3 Season 4
The best way to collect DNA samples quickly is by playing the Zombies mode. The risk of dying is very low (but not impossible) and you can easily collect both Ade and Cyto DNA samples (two of the four DNA samples currently available). Start by removing the Tier 1 Zone and completing contracts, such as raiding weapons and defending areas. This will trigger hordes of zombies to come your way, allowing you to get a ton of easy kills in the early stages. Move around the map if you are more of a wanderer or set up a proper camp to clear out the Zombies. By the end of the contract, you’ll get about 50 kills, which equates to 50 DNA samples.
In general, Cyto’s DNA samples (Orange) are much rarer than Ade’s (Blue) samples in my experience, so you’ll have to farm a bit more efficiently to get them. The most efficient way to get Cyto DNA samples is by killing special zombies because these have a higher drop to them. Regular zombies drop these but the rate is very low (about 1-2 out of 5 zombies in the Tier 1 zone).
Another way to farm DNA samples is to call the ex-fil helicopter, which unleashes a horde of zombies. When you think you have farmed enough, you can exfil or do this method again for more DNA samples. Farming in the Tier 1 zone is beneficial because you can easily find a lot of zombies and again, the risks are very low. If you farm the Tier 1 zone during the initial 45 minutes in a Zombies session, then you can easily collect around 1000 DNA samples. This will help you get the most rewards from the Critical Countdown events.
For more on Modern Warfare 3, check out All ranked Revive rewards and How to get them in MW3 Season 4, here on Pro Game Guides.
