Project Parasites

Project Parasites is a survival horror mod for Fabric 1.21.1. A meteor lands near you and leaves a core that corrupts the terrain. The air becomes toxic, parasites start appearing, and the outbreak grows harder to contain.

The mod is inspired by Scape and Run: Parasites. I made the code, models, textures, animations, and sounds for this project myself.

Choosing a difficulty

Choose Normal or Extreme when you first enter a world. The choice is locked afterward. On a server, the first player to join chooses for everyone.

Normal gives you more time to respond, with weaker enemies and faster infection recovery. Extreme adds enemies that learn your tactics, break blocks, and spawn more enemies after deaths.

Corruption and infection

The outbreak progresses in phases. First the terrain changes and the air becomes toxic without hazmat protection. Stronger parasites and outbreaks follow, then hive structures and bosses. Corruption continues while you are away from the area.

Attacks and toxic air build your infection level. Symptoms progress from nausea to slowness, then hunger and weakness, and finally wither damage and blindness. Antidotes and hazmat armor help you manage it.

Creatures

• Crawlers climb walls and attack in groups. Spitters leave acid pools, Lurkers hide and ambush, and Swoopers attack from the air.
• Stalkers flank you and freeze when watched. Broodmothers spawn smaller parasites, while Infectors turn vanilla mobs against you.
• The Hivemind strengthens nearby parasites and uses coordinated slam attacks. The larger Leviathan is immune to fire.

Zombies, cows, villagers, and other vanilla mobs can become infected. Iron golems are protected in Normal mode.

On Extreme, parasites respond to your fighting habits. Frequent bow use makes them zigzag and close in faster; fighting underground increases cave spawns; fire use builds their resistance. They also organize into swarms with assigned roles. Normal disables these behaviors.

Equipment

Early tools include Warding Torches for safe zones, Antidote Potions, and the Noise Dampener. Later, you can use the Parasite Scanner HUD, Flamethrower, Decoy Blocks, Immunity Serum, and Hazmat Armor with 80% infection resistance.

Late-game equipment includes the boss-dropped Parasite Bane Sword, Hive Destroyer, Purification Beacon, and Corruption Purifier, which shuts down meteor cores.

Events

The first meteor is scheduled at five minutes, or ten in Normal, with more arriving afterward. Blood moons bring a red sky, faster corruption, and more spawns. Outbreaks send waves of parasites through heavily corrupted areas.

Configuration

Edit config/projectparasites.json to adjust corruption speed, spawns, and difficulty settings, or disable individual creatures. Server admins can use /parasites commands for testing and management.

If you try it, leave a comment about how your world holds up.

Project Parasites brings an alien outbreak to Minecraft 1.21.1 on Fabric. A meteor leaves a core that corrupts nearby terrain, makes the air toxic, and spawns parasites. Left alone, the outbreak spreads and stronger creatures appear.

Inspired by Scape and Run: Parasites. All code, models, textures, animations, and sounds in this mod are my own work.

Difficulty

Choose Normal or Extreme when you first enter a world. The choice is permanent; on a server, the first player chooses for everyone.

Normal gives you more time to contain the outbreak. Extreme enables adaptive enemies, block breaking, and extra spawns from deaths.

Corruption

Corruption progresses through four phases and keeps spreading while you are away from the area. In Phase 1, terrain starts changing and the air becomes toxic without hazmat gear. Phase 2 brings stronger parasites and outbreaks. By Phase 3, hive structures grow and bosses appear.

Creatures

Vanilla mobs, including zombies, cows, and villagers, can become infected. Iron golems can be infected on Extreme.

On Extreme, parasites respond to your tactics: frequent bow use makes them zigzag and close in faster, underground fighting increases cave spawns, and fire use builds their resistance. They also coordinate in swarms with different roles. Normal disables these behaviors.

Equipment

Start with Warding Torches to create safe zones, Antidote Potions, and a Noise Dampener. As you progress, you can make a Parasite Scanner with a HUD overlay, a Flamethrower, Decoy Blocks, Immunity Serum, and Hazmat Armor with 80% infection resistance.

Later tools include the boss-drop Parasite Bane Sword, Hive Destroyer, Purification Beacon, and Corruption Purifier. The purifier can shut down meteor cores.

Infection and events

Parasite attacks and toxic air increase infection. Its stages cause nausea, then slowness, then hunger and weakness, and finally Wither damage and blindness. Use hazmat gear and antidotes to manage it.

The first meteor arrives after five minutes on Extreme or ten on Normal, with more arriving later. Blood moons turn the sky red and increase corruption and spawns. Outbreaks send waves of parasites through areas with high corruption.

Configuration

Edit config/projectparasites.json to adjust corruption speed, spawn rates, difficulty, and individual creatures. Server admins can use /parasites commands for testing and management.

Please share bugs and feedback after trying the mod. This has been my largest project so far, and I'd like to hear how your world holds up.