BlazBlue: Cross Tag Battle Special Edition

The wording of this achievement was a little unclear to me -- you need to guard against an enemy's aerial attack or block when someone attacks you from midair, not an attack that isn't low.

Play enough VS matches against the AI and block enough and theoretically this will happen over time. If you have a second controller, here's a faster way:

Also, not all of us are fighting game players, so here's the steps broken down:
Grab a second controller and start a VS match against yourself by pressing from the main lobby and going to V.S. Mode. Select your characters, stage, music, order, all that stuff. Once the match starts, walk both of the fighters to a wall (probably walk to the left until they can't anymore), with the blocking fighter with their back against it. Having your back against the wall will prevent you needing to readjust after each guard.

Using the directional button or stick, hold the opposite direction of what side your opponent is on (or the "wall" side). Your opponent is attacking you from the right, hold . If opponent is attacking from the left, hold .

While you're guarding, use the second controller to jump and do a midair attack. ( or to jump, and then while midair, press or .) Do this 10 times and the achievement will unlock immediately.

While you're at it, you can get the
achievement too by doing something very similar. Low-guard by pressing the opposite directional down button (ie or ) and have the second controller low-attack (ie and ). Do this ten times also to get both. Yay cheers.

I found a quick and easy way for this achievement. Load up a vs match with a second controller and pick whatever character you want. Then have the second controller throughout a attack. With your main controller hold back on the left stick. After I found this I got it in like 10 seconds. Hope this helps !