Injustice 2: 7 Crucial Pro Tips The Game Doesn't Tell You
6. When & How To Block Properly (Chip Damage)
Unlike in Mortal Kombat where it had a dedicated button, blocking in Injustice 2 is performed by holding the analog stick in the opposite direction to your opponent, Street Fighter-style.
This is important to note, because as your character moves away from the opponent whilst blocking, it has the added disadvantage of moving your character further into the corner when not being hit. Being on the wrong side of the screen when you've moved to either corner of the stage will result in the opponent being able to pull off longer, easier combos - not to mention stage transitions.
As well as this, you'll still take what is referred to as reduced "chip damage" when blocking. Whilst reduced damage is certainly better than full damage, always keep in mind that some characters, like Aquaman, are designed to pressure the opponent into blocking as they have very high chip damage.
In fact, Aquaman has an unlockable trait that increases his chip damage to insane levels, making it kinda pointless to block at all.
So, whilst it can be useful most of the time, it's important to keep in mind that sometimes, being the first to attack is a much stronger defence.