Grid inventory - Items take a rectangle of cells and turn with Rotate. Pockets, a belt with two pouches and a 4x3 satchel are always yours and never lost.

Packs and chest rig - Wear a Field Pack (5x4) or a Ranger Pack (6x5) in place of the satchel, and a Chest Rig with four pouches in place of the belt.

Workbench - A new base tab lays your gun on the bench to fit or take off its attachments, at once and for free.

Saved kits - Keep up to three kits on this computer and pack one with a key, or repack the last kit you deployed.

Weapon attachments - Two suppressors, a holographic sight, a 4x scope, a weapon light and a padded stock, each with a gain and a cost.

Field fitting - Fit an attachment from the inventory in 3 seconds. Taking damage or sprinting breaks it off.

Aim zoom - Sights zoom when you aim, and the 4x scope fills the screen with its own reticle.

Melee weapons - The Machete, Nail Bat, Fire Axe and Crowbar join the knife. The crowbar forces locks quietly and the axe breaks the tunnel's boards.

Heavy swing - Hold aim with a melee weapon to wind up a blow that hits harder and staggers, for more stamina.

Throwables - Molotovs set the ground on fire, pipe bombs beep to pull the horde in before they blow, and road flares burn red for a minute.

Armored infected - Its helmet and vest soak hits until they break. An axe blow, a heavy swing or a pipe bomb strips them.

Bloater - A swollen infected that bursts into a cloud of gas when it dies or reaches you. Wear a mask.

Situations - Something can happen during a run: a supply drop, a marked infected, a lost crew or heavy cargo, at most one per run and never the same one twice in a row.

Supply drop - A helicopter drops a crate of ammunition and supplies under an orange smoke column, and its first search draws a pack.

Marked infected - A tougher Brute or Armored infected and its escort, marked on your HUD, carry a plan you have not learned yet.

Lost crew - Two guarded bags left by a lost recovery crew, with their radio beacon still calling.

Heavy cargo - Carry an ammunition chest, a medical cooler or a generator home in both hands. You move slowly and cannot fight while carrying it.

Pickup card - A crew lost in the Forest leaves its handwritten notes for whoever finds them.

Main menu scene - The main menu now plays an extraction at dusk in the Forest, with ambience and no music.

Take-off - Extracting from a helicopter deck shows the lift-off before the results. Skip it after half a second.

Options screen - Graphics, audio, interface and controls on one page, applied at once, with presets from Low to Ultra.

New sounds - Melee swings and blunt hits, the molotov's glass and fire, the pipe bomb's beep and blast, the flare's strike, the heavy cargo and the Bloater's burst.