1. Parrying Windows & The Gun Strike Mechanic
When Tyranid Warriors or Chaos Marines swing at you, observe the glowing blue circle icon. Tapping L1 parries the strike, staggering the attacker and placing a red crosshair target over their head. Immediately tap your sidearm trigger to execute a "Gun Strike"—a devastating point-blank pistol shot that restores one segment of your Armor bar and deals massive damage.
2. Synapse Severing: Eliminating the Swarm via Leaders
Tyranid Hormagaunt swarms consist of hundreds of skittering minor beasts linked by synapse creatures. Do not waste precious bolter rounds spraying into small gaunts. Focus fire exclusively on Tyranid Warriors and Zoanthropes. Executing a synapse warrior unleashes a psychic shockwave that instantly kills or stuns all surrounding minor gaunts.
3. Operations Class Compositions: Tactical, Heavy & Bulwark
On Substantial and Ruthless difficulty Operations, squad balance dictates survival. A premier three-marine composition features a Heavy (suppressing major threats with the Heavy Bolter and Iron Halo shield), a Bulwark (drawing melee aggro with the Storm Shield and dropping healing chapter banners), and a Tactical marine using the Auspex Scan.
4. Countering Red Unblockable Attacks
When an enemy flashes a red circle warning, the incoming attack cannot be parried. You must execute an immediate dodge roll to the side or backward. Certain heavy bosses (Carnifex and Helbrute) follow up unblockable charges with sweeping tail swings; be prepared to double-dodge before returning to melee range.
5. Weapon Tier Progression & Mastery Points
Weapons in Operations progress through four tiers: Standard, Master-Crafted, Artificer, and Relic. Completing higher difficulty missions awards Armory Data slates to upgrade weapon tiers. Unlock weapon perks that enhance contested health recovery: when taking damage, striking enemies rapidly converts white contested health back into permanent HP.