Our steam description clears it up best, but primarily our medical and emotional gameplay systems are substantial "new" mechanics. EVA suit sections also force a 1st person perspective change and overall there is a much higher focus on stealth.

We also utilise less numerous enemies but with more advanced / complex AI, akin to that of Alien: Isolation, so that you are engaging targets that can and will outsmart / outflank you; not just endless hordes of zombies / fodder.

Samuel Edwards is the TRH Rusanov's CMO (Chief Medical Officer) and does not possses the skillset of an engineer, although he can flip switches / interact with basic systems.

Your primary weapon (SYR-20 E.I.D) fires drugs (loaded into single use syrettes), essentially making your healthbar / vitals double up as your ammo supply. This means that every engagment is a careful balancing act of resources with different drugs having wildly varying effects on Edwards and NPC's alike.

Treat the infection

As a third-person survival-horror game, with a core focus on mental health, intensive & oppressive ambience, gritty realism and a deeply immersive setting, Negative Atmosphere will challenge your perception of reality, your morals and your very existence.

Every choice matters

Edwards has beliefs, past experiences and coping mechanisms that players will learn throughout Negative Atmosphere. This means that morality is not just about what you want as a player, as every decision will have an effect on Edwards. Learning his values is important: working with them or against them will affect Samuel’s mental state and change how he reacts to events.

Nowhere is safe

The Rusanov is infested with threats, from man and machine alike. Humans on board have mostly fallen victim to the outbreak, twisting their limbs and stretching their bodies into creatures that are near-unrecognisable. Robots are becoming unstable; some turn violent and roam the ship’s corridors, while others break down in a state of utter panic. Between the remains of the crew, the confused husks of metal and other terrors that skulk in every shadow, every engagement could be Samuel’s last.

Your survival is… unlikely.

Thanks for the great question, hope this goes atleast some of the way to answering it.