Volatile Blister - runs at you and bursts; shoot it first, ideally inside a pack
Mitotic Cell - splits into two fast Daughter Cells when it dies
Phage Lens - snipes along a red sightline that locks just before it fires; step off the line or behind cover
Symbiont Mender - hangs back and heals the worst-hurt hostile near it
Boss phases - every boss fights in two or three named phases, adding chained charges, shockwave slams, spiral barrages, blinks, spore mines, toxic trails or escorts that shield it
Vertical look - a setting for how fast the view tilts compared with turning, for mouse and controller, at 40% by default
Research hub - Research opens on a choice of Upgrades, Mutations and Strains
Animated title - a slow camera drifts through a floor of wandering hostiles behind the menus
Reloads - the gun lowers, jolts as the magazine seats and comes back up, with sounds for each gun family
Enemy sounds - alert, pain and death cries in four voices, heavy footsteps, and sounds for the new hostiles and boss phases
Rarer bosses - the Campaign boss fight is the Director on round nine, which can now release any of the six; Survival sends a boss every eighth wave
Pathfinding - hostiles find their way around walls and each other instead of piling up, spread out around you in melee and step aside when stuck
Scarcer ammo - fewer drops, smaller refills and reserves capped at twice the base amount
Pulse Lance - half its hits echo, with 36-round magazines and 0.6 s reloads
Boss bars - gold marks at each phase change, and teal while a boss is shielded
Mutation sound - now a bright rising chime
A Campaign victory banks 10 samples
The death screen names lens shots and boss slams
Menus no longer reopen with Back selected
Hovering hostiles no longer leave their remains floating in the air
Co-op players now see every boss phase and shield, not only the Director's
Bosses on Campaign rounds 3 and 6
Boss and enemy balance is still being tuned after these changes