Achievements – What is a Double Perfect in Runner2?

Basic Moves

• Evade 360: (Ⓐ,Ⓐ) PS3: (✕, ✕)

• Strike 360: (Ⓧ) PS3: (□)

• Counter 360: (ⓨ) PS3: (△)

• Stun 360: (Ⓑ) PS3: (◯)

• Ultra Stun 360: (Ⓑ,Ⓑ,Ⓑ) PS3: (◯,◯,◯)

• Aerial Attack (Ⓑ,Ⓐ,Ⓐ+↑ forward) PS3: (◯,✕,✕+↑ forward)

Combos

• Special Combo Multi Ground Takedown 360: (Ⓐ+Ⓑ) PS3: (✕+◯)
  • Requires an enemy dazed on the ground
• Special Combo Disarm and Destroy 360: (✕+ⓨ) PS3: (△+□)
  • Usable against enemies with any weapon (gun, knife, sledgehammer)

• Special Combo Bat Swarm 360: (Ⓐ+✕) PS3: (□+✕)

• Combo Batarang 360: (tap LT) PS3: (tap L1)

  • You can supposedly use any 1 gadget, but the Combo Batarang is the simplest to fire off quickly and reports vary on which ones count, so this is the safest

Finishers

• Ground Pound 360: (RT+ⓨ) PS3: (R2+△)
  • For finishing off dazed enemies on the ground

• Special Combo Takedown 360: (Ⓑ+ⓨ) PS3: (△+◯)

• Beat Down Finisher 360: (Ⓑ, ✕repeatedly) PS3: (◯,□ repeatedly)

Good places to complete this are the Survival of the Fittest Challenge Map or on the Joker's Carnival DLC Map (if you have that available to you). You should definitely get as many combat upgrades as possible, or at the very least, get the Special Combo Boost and Freeflow Focus upgrades. Critical Strikes will also help build your multiplier faster.

Credit goes to Xbox 360 Achievements for the listing!

I was able to get this in a single player Spec Ops game by doing the following:

• Take the Self-Revive at the start of the level
• Call in a care package, which will be a Sentry Gun (you can't decide what the package will contain, unlike in co-op)
• Call in another care package, which will be an Arsenal (ie, an XM-25+Claymores)

There's no need to call in another package. I did call a third one in, which was a sentry gun again, but I did not pick it up. This did not seem to disqualify me. I assume if I'd already used my Self Revive by this point, I'd end up getting another.

I will also add that I ended up using my self-revive, but never called in another. Judging by the comments, this seems to be important. I also did not have to fire the XM-25 or set any of the claymores from the Arsenal package.