While most melee attacks can be Parried in 007 First Light, there are two instances where you will be unable to Parry. The first instance is Charge Attacks, which provide a red glow instead of a yellow one. To avoid Charge Attacks, you will need to side step out of the way, as Parries are useless here. The other instance is when enemies themselves are Parrying or Blocking. In these instances, since they are not attacking, Parries are useless. Instead, perform a Grab by holding the Grab button on the enemy and follow up with some punches, or press and release Grab to throw them and break their