About This Game

You are the director of a biotech organization running covert operations to bend global politics and markets to your advantage. You never set foot in the field. You engineer the agents who do.

It is a hardcore management sim, played entirely from the control desk. Take the contracts, arm squads and deploy them into conflicts around the world. Then watch the operation unfold live on the feed wall: through your agents' eyes and tactical displays.

Every body has a heart, lungs, kidneys and other organs, each simulated in its own place under the skin. Every bullet destroys exactly what it hits, and what it hits stops working at once. A round through the chest is not a number off a bar. It is a specific organ, gone.

THE FEED WALL

These are not security cameras. Every feed is an agent's own transplanted eyes, so their breathing, their flinches and their injuries are in the picture. When one goes down, their feed goes dark.

Every job comes with terms, a fee and a risk you have to weigh yourself. Raids, holds, snatches and hits. A corporate tower in Shanghai, an evening walk along a seawall in Rio. Offers expire. Jobs relist. Leads go cold. Field one or two squads, depending on the mission, and choose when they launch. The dropship flies in real time, and day becomes night while your agents are in the air.

Combat is automatic. You do not aim and you do not push units around a map. Your agents take cover, suppress and fight on their own, with the bodies and the loadout you gave them. When the situation in the field changes, you get a few options for how to act. One call, no take-backs. Then you watch how it plays out.

THE LAB

A wounded agent comes home and goes straight onto your operating table. Operate on any of 14 anatomical zones. Replace damaged organs with whatever the next job demands. Later, print transplants from biological templates, matched to the agent who receives them, and push your team past human limits: a cortex that flags a threat before the eyes resolve it, a blade grown along the forearm bone, a skin that makes a motionless body all but disappear.

A vast library of transplants can be researched and recovered in the field. Every transplant is living tissue that draws on the host's blood, oxygen, nerves and metabolism. There is a hard limit to what the body can tolerate, and every surgery takes days to recover from.

Build the body you need. Then find out what it can survive.

THE ARMORY

What stands between a bullet and an organ is a plate. Vest and helmet, replaceable, each wearing out on its own. A plate does not reduce damage by a percentage. It either stops the bullet or it does not: a vest that stops every pistol round is useless against a rifle. Even a plate that stops the bullet passes the impact through to the body. They come home cracked, and the bench bills you for replacements.

There is no best gun, only the right gun for the job. Nothing you buy or loot is simply better than what you already have. The suppressed SMG trades range for stealth, the shotgun dominates a single doorway, and the armor-piercing rifle is worse than a cheaper one at everything except defeating a plate. Ammunition is stocked by caliber, not by weapon. So two rifles that fire the same round share one supply.

THE SALVAGE

Something worth taking usually turns up mid-operation. Sending someone for it costs you noise. At the debrief you decide what comes home and what stays behind: a trophy weapon, a rare transplant, or an injured agent.

The real cost is what you left behind. Bodies. Wreckage. Witnesses. Wounds no forensics lab has a catalog entry for. Someone is watching the pattern. A clean operation isn't just one where everyone comes home. It's one nobody can prove happened.

THE ORGANIZATION

You start with two agents and one contract on the board. Everything after that is your doing: a roster built from walk-ins and people bought out of worse jobs, bodies rebuilt to specifications nobody else can match, a service record written by the weapons each agent actually carried.

A tower changes hands because four people were on a particular floor at a particular hour. A currency moves because somebody did not arrive at a meeting. None of it is ever traced back to the desk, and none of it would have happened without one. 

Reach everywhere. Never leave the room.

Mature Content Description

The developers describe the content like this:

Second Heart contains frequent depictions of violence, presented through a tactical command interface and simulated body-camera feeds.

Gun violence and death. Missions involve firefights between your agents and armed guards and machines. Characters can be shot, wounded by blades or grenade blasts, and killed. Deaths are permanent: named characters you recruit and invest in can die and are memorialized.

Medical and surgical imagery. A core part of the game is a laboratory where you surgically modify personnel with biological grafts. This includes stylized anatomical cutaways of the human body, including organs, blood vessels, and the skeleton, as well as surgical planning imagery and organs displayed in research jars. The imagery is clinical rather than gory, but anatomically explicit and sustained.

Injury detail. Wounds are tracked by body part and represented through medical readouts showing conditions such as bleeding, trauma and cardiac arrest. Combat feeds include blood effects but no dismemberment.

Dark themes. The story follows a private paramilitary company that acquires recruits through illicit channels and modifies their bodies for its operations.

The game contains no sexual content, sexualized nudity, sexual assault, depictions of drug or alcohol abuse, or self-harm. There is no profanity in the game's text.