First person mode, picked by the host for the whole crew
The Narrow Gauge map with a hand-pumped handcar and a passenger car
Six anomalies with their own artifacts: Zhom, Styn, Spark, Hum, Loop, Heat
Bolts on Q and an anomaly detector
Dodge roll on Space
Gear overhaul: suits, exoskeletons, gas masks, boots and backpacks with perks
Physgun
Slot machines, corner shop and bestiary terminal in the bar
Zenit camera that unlocks monster facts
Spray can, alarm clock, rubber duck
Searchable crates, cabinets and safes
Smashable monster corpses that drop their head as loot
Wrist PDA and a mirror in the truck
Faster movement, longer sprint, Half-Life style jumps
Rebuilt cellars and sewers
50% more monsters, all out from the start, better hearing
Monsters fight each other only in sight
Heavy armor survives instant kills
Loot on paid maps worth twice as much
Brighter flashlights, longer batteries
Map edge is a wall with radiation instead of instant death
Atlases for large numbers of models and textures, Impulse runs at 138 fps instead of 87
Host voice going silent on locations
HUD, menu and mirror vanishing after joining
Missing houses for players on the Narrow Gauge
Items placed on the truck shelf landing in the wrong spot
Players leaving a run alive shown as "alive" in the report