Depth	Notes
1 – Topside	Deployment level. LoS-blocking terrain. Safest.
2 – The Mids	Interior corridors. Most action happens here.
3 – The Sink	Table surface. Most dangerous. Best Salvage (+1 to quality roll).

Measure true 3D distance between units at different depths. 2.5–3" per level is a good guide.

D8 Direction: roll D8 to determine a random direction. On a result of 1, Unalert NPCs do not move.

• I. Boiler Phase — Roll initiative (each player rolls best remaining unit's stat; most successes wins; tie = reroll). Alternate activating one unit each until all done.
• II. Enemy Phase — Activate all Unalert hostiles (random move), then all Alert hostiles (per Motivations on unit card). Player with initiative draws and resolves one Event Card after all hostiles activate.
• III. End Phase — Check win/round limit. Clear round effects. Resolve ongoing damage. Begin new round.

• 1. Declare: Choose target. Declare melee or ranged. Ranged requires target within range + LoS. Melee requires base contact.
• 2. Attack roll: Roll Muscle (melee) or Smarts (ranged) + weapon bonus dice. Max one bonus die source total.
• 3. Defence roll: Roll Armour + gear bonus. Max one bonus die source total. Costs no Power.
• 4. Resolve: More attacker successes = hit + weapon damage. More defender = miss. Tie = attacker wins. Neither scores successes (melee only) = both pushed 1" apart.

Dice / Situation	Effect
Critical High (8)	+1 dmg per 8 on attack roll
Critical Low (1)	Cancels one success (not a Crit High)
Ranged vs Prone target	TN +1
Melee vs Prone target	TN -1
Target in Cover	TN +1
Friendly in contact with either combatant	+1 die per friendly (each side counts their own)
Crit Low, firing into melee (hit)	Damage applied to random Engaged unit

LoS: eyeline view to target. Cover: target obscured by terrain. Visibility: max measurable distance a unit can see — some rules impose a limit on this independently of LoS.

TN limits: never below 2 or above 8. All modifiers stack.

Action	PWR	Description
Move	1	Move up to Move stat in inches.
Crawl	1	Move 2". Usable while Prone.
Run ●	1	Move +2" extra. Generates Noise.
Stand Up / Go Prone	1	Change prone state.
Jump	1	Leap gap or drop up to Move value.
Launch ●	2	Jump +2". Muscle test or fall to nearest lower depth/edge, placed Prone.
Climb	1	Ascend or descend up to Move value.
Scale ●	2	Climb +2". Muscle test or fall to nearest lower depth/edge, take 1 dmg + Prone.
Ranged Attack	2	Make a ranged attack.
Melee Attack	1	Make a melee attack while Engaged.
Disengage	2	Muscle test. Pass = free 1" move out of Engagement. Fail = cannot move.
Shove	1	Opposed Muscle test (must be Engaged). Win = push defender any direction up to your Muscle stat in inches. Lose/draw = both pushed 1" apart.
Use Item	1	Use a carried item or equipment.
Interact ●	1	Cycle Airlock / open or close door / interact with object / search MW hostile. Smarts test.
Extract Salvage ●*	1	Muscle test at Salvage site. Pass = 1 Salvage token. *No Noise on fail.
First Aid	1	Restore 1 Health OR remove 1 Condition.
Concentrate	1	+1D8 on next test. Max 2 tokens at once. Token consumed on use.
Rest	1	Remove 1 Exert OR 1 Blight. If Exerted this activation, can only remove Blight.
Exert	0	+1 Power this round only. Place Exert token. Future activations: -1 Power per token until removed with Rest. Max 2 tokens.

A unit may take the same action multiple times unless stated otherwise. When Power = 0, activation ends immediately.

• Default TN: 6. Roll equal to or above = 1 success. Need 1 success to pass a Simple Test.
• TN limits: Never below 2 or above 8. All modifiers stack.
• Initiative: Each player rolls best remaining unit's stat. Most successes chooses activation order for the whole round. Tie = reroll.

Situation	Rule
Small obstacle ≤1"	Free to cross.
Difficult ground	Move halved, minimum 1".
Impassable terrain	Cannot enter or pass through.
Friendly units	May pass through; cannot end movement overlapping.
Enemy units	Cannot pass through unless a rule explicitly allows it.
Fall — within same level	1 dmg. Place directly below point of fall, Prone.
Fall — through 1 depth	1 dmg + Prone at lower depth.
Fall — through 2 depths	2 dmg + Prone.
Fall on another unit	Both take 1 dmg + Prone, placed 1" apart.
Forced fall	Pushed or knocked over edge = falls immediately, no test.

• Base contact with an enemy = Engaged. While Engaged, may only perform combat actions.
• To do anything else, must first successfully Disengage (2 Power, Muscle test).

• Open or close with a successful Interact action.
• Closing a door on a unit: that unit takes 3 damage and is pushed to one side.

• Each Noise event: advance Danger Tracker 1 space.
• Any Unalert hostile within 6" of Noise source = immediately Alert.
• Unalert hostile enters base contact with a Boiler = immediately Alert.
• Unalert hostile takes any damage = immediately Alert.
• Once Alert, always Alert (unless a rule states otherwise). Noise markers removed at End Phase.

• Each item/Salvage has a Size value using that many Capacity points. Each Salvage token = 1 Capacity.
• Over Capacity: -1 max Power per point over. If max Power = 0, drop random items until 1 max Power remains.
• Cannot begin a game over starting Capacity. Power refreshes fully each round.

D8	Type	Notes
1–3	Scrap	TN = roll result. The Sink: +1 to quality roll.
4–5	Useful	Max 4 extractions per site.
6–7	Valuable	Danger TN modifier: All Quiet +0 | Low +1 | Med +2 | High/Max +3
8	Rare	Quality roll increases as Danger rises during the game.

Track	Danger Level	Interact TN
1–4	All Quiet	Cannot be used
5–9	Low	TN 7
10–15	Medium	TN 6
16–19	High	TN 5
20	Maximum	All Airlocks OPEN

• Must be in base contact + successful Interact (Smarts test) to cycle. Cannot cycle at All Quiet.
• Max 3 units per Airlock exit, then permanently locked. Seals automatically after each use.
• A unit may cycle an Airlock to allow a different unit to exit through it.

• 0 Health = Mortally Wounded. Place face down. Cannot act or move. Remains on table.
• Searching MW hostile: Move into base contact + Interact action = gain listed Scrip from unit card.
• Max 3 Boilers per mission. Must include 1 Boss.
• Crews always deploy on Topside unless the scenario states otherwise.

Condition	Effect
Burning	Before each action: Muscle test or take 1 dmg.
Stunned	All test TNs +2.
Bleeding	On activation: Muscle test (TN 7) or take 1 dmg.
Blinded	May only perform 1 Action per activation.
Poisoned	Before each action: Smarts test or gain 1 Blight.
Unlucky	Re-roll all successes once; keep the second result.
Exhausted	Movement -2", minimum 1".
Panicked	Start of activation: must Move toward nearest Airlock (costs Power).
Pickled †	Causes Noise when performing a Move or Crawl action.
Prone ‡	Face up. May only Crawl or Stand Up.
Mortally Wounded ‡	Face down. Cannot act or move.

Remove Conditions: First Aid removes 1 Condition. † Pickled: removed when the granting item is removed. ‡ Prone: use Stand Up action. Mortally Wounded: resolved in post-game only.

Track	Level	Effect
1–4	All Quiet	Site dormant. Airlocks cannot be cycled.
5–9	Low	Systems destabilise. Event Cards drawn normally.
10–15	Medium	Structural failures. Higher Salvage at deeper depths.
16–19	High	Site collapsing. Airlock Interact TN reduced.
20	Maximum	Total failure. All Airlocks open automatically.

• Entering a new Danger section: the unit that caused the Noise immediately draws an Event Card + crew gains 1 Blight.

D8	Hazard	Effect
1	Acid Pool	Enter/end activation: 1 dmg (no armour) + Poisoned.
2	Waste Chute	End activation within 1": move up or down 1 depth (D4: 1–2 up, 3–4 down) + 1 dmg.
3	Metal Press	End of each round: base contact = 2 dmg.
4	Explosive Container	Takes any damage: removed; all within 3" take 1 dmg (no armour) + Noise.
5	Grav Pool	Enter/end activation: Panicked + free 6" random move.
6	Invasive Flora	Base contact: causes Noise.
7	Burn Pit	Enter/end activation: 1 dmg (no armour) + Burning.
8	Dark Engine	Within 3": Smarts test before activating or move 3" toward own deployment area.

• Gained when Danger enters a new section (+1), or from enemy abilities and scenario events.
• Reduced by Rest action, certain Rations, or specific items.

• Roll 1D8 + current Blight + 1 per Mortally Wounded Boiler.
• 1–10: No effect.  11+: Roll 2D8 on table below. Blight resets to 0 after (unless result says otherwise).

2D8	Blight Manifestation Effect
2	One random Boiler permanently lost from roster.
3	One Boiler: -1D8 Muscle and -1D8 Smarts next mission.
4	One Boiler cannot carry Salvage next mission.
5	One random Boiler cannot carry Augments next mission.
6	Boilers cannot deploy within 2" of each other next mission.
7	All Boilers -1" movement in round 1 of next mission.
8	Boss Perk cannot be used next mission.
9	One random Boiler cannot Exert next mission.
10	All Boilers max visibility 12" next mission.
11	One random carried item destroyed.
12	Remove 2 food/consumable items from stash.
13	One random Boiler -1 Capacity next mission.
14	One random base upgrade removed.
15	+1 additional Blight per Danger Level gained next mission.
16	All crew -1 Max Health for next 3 missions. Blight NOT reset.

• Player without initiative picks first unit to activate; alternate until all Unalert done.
• Roll D8 for direction. Move unit its full Move value in that direction. Result of 1 = unit does not move.
• Stops at table edge. If already touching that edge, moves toward centre instead.
• If movement reaches a climbable surface with distance remaining: unit Climbs.
• Unalert units cannot perform Launch or Scale actions.
• No Power tracking. One Move action only per activation.

• Player with initiative picks first unit; alternate until all Alert done.
• Follow Motivations listed on unit card in order. Spend Power per action. Alert hostiles do not track Ammo.
• When a rule is unclear: choose the action causing the most mayhem.

• Player with initiative draws one card after all hostiles have activated.
• Face/number cards: check the current Danger level row and apply the appropriate effect.
• Deck exhausted: reshuffle the discard pile into a new deck.

Step	Details
1 Theme	Special environmental rule for the mission.
2 Salvage	Placement by quadrant and depth.
3 Deployment	Attacker/Defender zones. Roll off once before mission to determine who is Attacker/Defender.
4 Airlocks	Number and location.
5 Hazards	Types and locations.
6 Hostiles	Placement. Draw one card per hostile slot to determine unit type.
7 Win Conditions	Defender rolls first, then Attacker. Each gets a separate objective + Scrip reward.
8 Game Length	D4: 1=5 rounds | 2–3=6 rounds | 4=7 rounds.

• 1. Injuries: D44 per Mortally Wounded unit. +2 if crew achieved Win Condition; -2 if not. Apply modifiers before rolling.

D44	Result	Effect / Duration
9–11	Killed!	Removed from roster. Gear lost to the void.
12–14	Death's Door	-1 Max Health. Permanent.
21	Heavy Trauma	-1D8 Muscle. Permanent.
22	Rattled Brain	-1D8 Smarts. Permanent.
23	Blinded	Cannot use Ranged Weapons. 3 missions.
24	Shattered Arm	Cannot use Two-Handed weapons. Permanent.
31	Internal Scarring	Cannot Exert. Permanent.
32	Damaged Filters	First Blight gain each mission +1 extra. 2 missions.
33	Limping Gait	-1" Movement. 2 missions.
34	Cracked Visor	All Ranged weapon distances -2". 1 mission.
41	Burned Circuits	Begins each mission with 1 Power already spent. 2 missions.
42	Nerve Damage	First Action each activation costs +1 Power. 1 mission.
43	Battered	No lasting injury. 1 mission.
44–46	Insurance Payout	Gain 35 Scrip. No injury.

• 2. Transit Find: Roll 1D4 per non-Mortally Wounded Boiler (max 5 dice). Total = bonus Scrip.

1–4	5–8	9–12	13–15	16–18	19–20
10 scr	20 scr	35 scr	50 scr	65 scr	75 scr

• 3. Blight Effects   4. Company Bond Track   5. Downtime — Spend Scrip, upgrade Quarters, buy/sell gear, trade with other players.

Status	Outcome
Escaped via Airlock	Keeps all Salvage and Items.
Alive, did not escape	Loses all Salvage collected. Keeps starting Items. Available next game.
Mortally Wounded	Loses all Items and Salvage. Must roll on Injury table.
Crew achieves Win Condition	All units treated as escaped via Airlock. Round limit -1 for remaining crew.

Keyword	Effect
Armor Piercing	Reduce defender Armour by 1D8 (minimum 1D8).
Blade	Critical Highs inflict the Bleeding condition.
Blunt	After damage, target pushed 2" directly back.
Explosive	Deals damage in a specified area rather than single target.
Heavy	May only be used once per round.
Long Reach (X")	Attack without being Engaged, up to listed distance.
Pistol	May be used while Engaged.
Powershot	+1 damage when attacking within half the weapon's total range.
Rifle	Cannot be used while Engaged.
Thrown	Target a point. Success = lands there. Fail = scatters 4" in random direction.
Two-Handed	Crit Highs: all enemy units Engaged with attacker take 1 dmg (no chain effects).