– Imperial Navy Breachers, hardened voidfarers equipped for close-quarters boarding actions– Farstalker Kinbands, cunning Kroot mercenaries accompanied by savage pets
– Kasrkin, elite veteran commandos of Cadia, well-armoured and armed to the teeth
– Hierotek Circles, obsessive Necron Crypteks and their loyal cybernetic guardians
– Hands of the Archon, covert Drukhari agents jockeying for prestige on clandestine missions
– Exaction Squads, specialists of the Adeptus Arbites, trained for subjugation with extreme prejudice
– Hearthkyn Salvagers, heavily-armed prospectors, scouting out plunder for the Leagues of Votann
– Fellgor Ravagers, furious Beastmen raiders who seek to prove their strength to the Ruinous Powers
– Inquisitorial Agents, versatile acolytes and requisitioned allies who put heretics to the torch
– Chaos Cults, warpsworn fanatics that mutate into new and terrible forms

- Rules for the walls and hatches of Killzone: Gallowdark, with Close Quarters rules for fighting in cramped conditions
- Additional terrain rules for four supplementary killzones – Into the Dark, Shadowvaults, Soulshackle, and Gallowfall

- Nine Critical Operations missions for Gallowdark games, offering balanced clashes with symmetrical objectives
- Four Shadow Operations mission packs – Into the Dark, Shadowvaults, Soulshackle, and Gallowfall – each including nine themed missions, for a total of 36
- Gallowdark Expedition campaign rules, allowing you to link your games together as you explore and salvage the space hulk

You'll need a copy of Kill Team Core Book to make use of this supplement.