Infection Game Walkthrough: Parasite

Symptoms: Blurred vision at 15%, occasional coughing.
Survival Strategy: Stealth is mandatory.

Your weapons (a broken pistol and a scalpel) are useless against human survivors who will shoot you on sight if you cough.

Your choices in Chapter 4 and your infection level when you grab the Mycelium Prime determine the ending.

Your first objective marker leads to Old Marta’s Pharmacy. However, the direct route is a trap. parasite infection game walkthrough

Wrong way: The main street has a sniper. You will die.
The Walkthrough Path:

Boss #1 – The Vomiter (Mini-boss): Marta is already infected at Stage 3. She vomits corrosive bile.
Strategy: Do not shoot her body. Shoot the IV bags hanging above her. The antifungal fluid inside stuns her for 8 seconds. Then, use the pharmacy’s gas stove to ignite the puddle of bile. Repeat twice.
Reward: Marta’s Diary (keycode: 1408) and your first Slow-Release Capsule (reduces infection by 10%, but adds +20% to the next stage’s speed).

Unlock in this order for maximum effect: Symptoms: Blurred vision at 15%, occasional coughing

Before beginning the walkthrough, it is essential to understand the systems driving the game:

I notice you're asking for a walkthrough for a "parasite infection game." There are several games with that theme (e.g., Parasite Infection on Roblox, Parasite Eve, The Last of Us, or indie horror games). To give you an accurate text walkthrough, could you please specify:

If you meant the popular Roblox game "Parasite Infection" (by Dragon Train Studio), here is a brief text walkthrough: Boss #1 – The Vomiter (Mini-boss): Marta is

Symptoms: Veins visible on arms. You can now hear enemy heartbeats through walls.
New Mechanic: The parasite starts helping you. Your melee attack now causes Flesh Rot (damage over time). However, human NPCs will now actively hunt you as a “Stage 2 threat.”

Objective: Secure safety and understand the initial infection.