Call of Duty: Modern Warfare 3 has released its last set of weekly challenges for Season 4. Completing any five of this week's challenges will unlock the Mutagen weapon blueprint for the FJX Horus, giving it a unique green tint. If you love using the FJX Horus, you'll want to pick this up.

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This is also the time to unlock this season's exclusive animated camo, as it will go away at the start of Season 5. In this guide, we'll go over all 21 challenges this week, how to complete them quickly, and showcase the unique weapon blueprint and animated weapon camo up for grabs this week.

Week 8 Challenge Reward

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Completing five of this week's challenges will unlock the Mutagen weapon blueprint for the FJX Horus. This gives the weapon a vibrant green shader with DNA strand decals over the grip and barrel. An animated shimmer is also present near the barrel and receiver.

Since this is the last week of the season, you can also unlock the Helical Reverb animated weapon camo by completing five challenges from every week this season. It gives the weapon a bright green color and covers it with rotating DNA strands. It can be applied to all MW2 and MW3 weapons.

Multiplayer Challenges

Multiplayer Challenges

Challenge

XP Reward

Get 20 operator kills while crouching with a recommended weapon.

2,500 XP

Get 15 kills with no attachments equipped to a recommended weapon.

5,000 XP

Get 15 kills with a suppressed recommended SMG.

5,000 XP

Get 5 kills while in smoke with a recommended SMG.

5,000 XP

Get 10 kills with a recommended SMG set to full-auto mode.

7,500 XP

Get 2 kills in a row without taking damage with recommended SMGs 5 times.

7,500 XP

Get 3 operator triple kills with the FJX Horus.

10,000 XP

Tips

  • Use the FJX Horus for all the SMG challenges. You can play in the small map playlist for easy kills.
  • For the no attachments challenge, use the Kar98K.
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Zombies Challenges

MWZ Challenges Challenge XP Reward Get 100 kills while crouching with a recommended weapon. 2,500 XP Get 300 kills with no attachments equipped to a recommended weapon. 5,000 XP Get 300 kills with a suppressed recommended SMG. 5,000 XP Get 3 Disciple kills with a recommended SMG. 5,000 XP Get 150 kills with a recommended SMG or handgun set to full-auto fire. 7,500 XP Get 5 rapid kills 20 times with a recommended weapon. 7,500 XP Get 500 triple kills with the FJX Horus. 10,000 XP

Tips

  • The FJX Horus with the JAK Scimitar Kit should make short work of these challenges.
  • Equip your SMG with Dead Wire Ammo to quickly kill Disciples.

Warzone Challenges

Battle Royale Challenges

Challenge

XP Reward

Get 5 kills or assists with a recommended weapon.

2,500 XP

In Urzikstan, open 20 loot caches in the northwest region (Resort, Power, Seaport, Cargo).

5,000 XP

In Urzikstan, open 20 loot caches in the southern region (City, Suburbs, Manor).

5,000 XP

Complete 10 contracts in Warzone.

5,000 XP

In Urzikstan, open 20 loot caches in the eastern region (Military Base or Farms).

7,500 XP

In Urzikstan, open 20 loot caches in the central region (Old Town, Low Town).

7,500 XP

In Warzone, place in the top ten 3 times.

10,000 XP

Tip

  • The loot cache challenges must be completed in Urzikstan.
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