Outbreak turns Insurgency: Sandstorm's co-op modes into a zombie last stand, with No More Room in Hell 2's infected built on your PC from your own NMRiH2 install.
Features
Outbreak Outpost: hold out through 7 waves of walkers and shamblers, with more runners every wave (1, 3, 5 ... 13). Start with 5 supply and earn 5 more for every wave you survive.
Outbreak Survival: fight from objective to objective through bigger hordes, then hold the extraction point until the helicopter arrives.
Gore that matters: shoot off arms and legs; zombies that lose their legs keep coming as crawlers. Grenades and explosives tear limbs off, and corpses keep their wounds.
Only runners lunge; walkers and shamblers shuffle and grab. Zombies set off AT mines.
Original zombie voices: groans, screams and attacks made for this mod.
Open armoury: every class can take every weapon and piece of gear; the commander carries binoculars and a radio.
Map vote: at the end of a match vote on the next map from 30 Outbreak maps, by day or by night.
How to play
Press Play. The first time, Melty builds the zombies from your No More Room in Hell 2 install (about 2-3 minutes).
In Insurgency: Sandstorm open the cmd console and put in any survival or outpost map command like shown and add outbreak for mutator "open Canyon?Scenario=Scenario_OBK_Crossing_Outpost?Lighting=Day?Mutators=Outbreak"
"open Citadel?Scenario=Scenario_OBK_Citadel_Survival?Lighting=Night?Mutators=Outbreak" at the end of game there is map rotation between survival and outpost maps so feel free to play any as you like.
Single player, fighting alongside an AI squad.
Notes
Needs both Insurgency: Sandstorm and No More Room in Hell 2 installed. No NMRiH2 content is included; it is read from your own copy, and NMRiH2 itself is never modified or launched.
Uninstalling leaves the generated zombie file (OutbreakNMR.pak, about 490 MB) in Insurgency/Mods/Outbreak; delete that folder to remove it.