The Carcass Factions and Diplomacy

You are not alone inside the dead god. Thirty alien species inhabit chambers, clot bazaars, and marrow markets—each with culture, goals, and grudges. Diplomacy in The Carcass is not a peace slider; it is memory. Betray one faction and others recall. Help a dying stranger and gain a loyal ally—or a hidden traitor. This guide teaches how to negotiate without locking yourself out of endings or biomass trade routes.

Faction basics

Species appear through events, region discovery, and story flags. Initial contact may offer:

• Trade agreements — import biomass or calcium
• Military pacts — warriors for parasite wars
• Knowledge exchanges — neuron boosts or mutation hints
• Shelter requests — new citizens with traits

Always read event text for hidden morality flags. The carcass tracks choices for New Game Plus and certain endings.

Trust and betrayal

Official marketing emphasizes: Betray one faction and the others will remember. Mechanically, expect:

• Closed or hostile trade windows
• Coordinated raids or embargo events
• Shifted ending eligibility (Dominion vs Symbiosis paths diverge here)

There is no “reload diplomacy” on Ironman. Save before major betrayals when allowed.

Blood pacts and wars

Some species offer blood pacts—high reward, high obligation. Refusing war calls may cost morale inside your colony if citizens sympathize with allies.

Wars of extinction are endgame content. Do not declare multi-front wars until combat guide readiness and resource guide buffers exist.

Diplomacy research branch

Research splits into combat, production, diplomacy, and forbidden arts. Diplomacy tech reduces treaty costs, improves trade yields, or unlocks pacifist endings. Cross-reference research tier list before you over-invest in forbidden arts early.

Species selection strategy

Use alien species tier list as a roster cheat sheet:

• S-tier allies stabilize demo economies with reliable trade
• B-tier situational partners for specific mutations
• High-risk species offer forbidden knowledge at betrayal cost

Tiers avoid major story spoilers but flag notorious traitor events.

Internal factions vs external species

Your citizens also form factions (citizens guide). External treaties can inflame internal ones—accepting refugees may anger isolationists. Balance rations and leadership appointments when diplomacy spikes morale volatility.

Event chains to watch

• Stranger at the door (accept/decline)
• Organ pulse with stolen memory (share/suppress)
• Voice in the wall offering deals (forbidden arts gateway)

Each ties into the nine endings. Document choices if you aim for 100% completion.

Diplomacy Pulse tips

Negotiation menus are free actions until an event resolves on Pulse advance (Pulse system). Use that to read all dialogue branches before harvesting or next.

When diplomacy fails

Pivot to combat mutations and self-sufficient biomass. Mutations tier list ranks bone armor and parasite resistance for solo survival.

The carcass remembers diplomats and butchers alike—choose which memory you want written on launch day.

Embassy timing

Open diplomacy menus before spending the last harvest Pulse of a season—free actions hide treaty penalties you need to read.

Deep dive: diplomacy memory

Thirty species share the carcass. Treaties, blood pacts, betrayals—all persist in event callbacks. Helping strangers can grant allies or traitors; marketing warns others remember betrayals.

Diplomacy research reduces treaty friction. Combat research makes wars viable. Mixing without plan angers internal factions when citizens disagree with foreign policy.

Free diplomacy menus before Pulse end—read every branch. Alien species tier list ranks alliance value without spoiling every arc.

Closing tips for diplomats

Read treaty text before Pulse end. Betrayal memory spans entire runs.

Closing tips for diplomats

free menu time before Pulse end—read every treaty clause.