The King of Fighters XIII Systems :

After a fall, to press + or will make a roll to spare time.

By pressing + or during a blockstun (Phase where you are blocked on guard) is possible of cancel the blockstun by a blow which knock down the opponent. He allows to escape from opposite steam-pressings.

By pressing + or or + or , it is possible of cancel the blockstun by a roll forward or backward.

It's the ultimate attack of every character. For their executions, the Neo max (except in HD Mode) requires 3 capacities of Power and full of the neomax gauge.

The HD mode is activated by pressing + simultaneously and consume the completeness of your neomax gauge(in a progressive way). In HD mode, during a duration limited every Drive Cancel and Super Cancel will be transformed into HD Cancel and will be thus free (but accelerate nevertheless the end of HD mode).