Immunity Protocol DLC Guide: All Expansions & Content

Overview of Immunity Protocol DLC

Immunity Protocol, the neon-pixel auto-shooter survival game, has expanded its universe with several downloadable content packs. These DLCs introduce new playable characters, weapon variants, and challenging biomes that build upon the base game's core loop of fighting evolving pathogens. This guide covers all official expansions, what they include, and how they integrate with the main progression system.

For players new to the game, understanding the base mechanics is crucial before diving into DLC content. Refer to our Beginner Guide for the fundamentals.

The Cellular Expansion Pack

The first major DLC, the Cellular Expansion Pack, adds two new playable immune cell units: the Macrophage and the Dendritic Cell. Each unit comes with unique starting weapons and passive abilities that alter your strategy.

• Macrophage Unit: Starts with a high-damage, slow-firing "Phagocyte Blaster." Its passive ability, "Engulf," grants a temporary shield after killing an elite enemy.
• Dendritic Cell Unit: Begins with a "Signal Burst" weapon that chains damage between nearby enemies. Its passive, "Antigen Present," increases the drop rate of upgrade modules for a short time after defeating a boss.

This pack also includes a new biome, the "Lymph Node," featuring tighter corridors and swarms of fast-moving bacteria. It's recommended to have completed the base game's campaign before attempting this content. For more on base game challenges, see our Challenges Guide.

The Antibiotic Arsenal DLC

The Antibiotic Arsenal DLC focuses entirely on new weaponry and gear. It introduces three new weapon classes: Rifles, Shotguns, and Beams, each with multiple rarity tiers. These weapons are not exclusive to any character and can be found in the base game's loot pool after installing the DLC.

Key additions include:

• Penicillin Rifle: A rapid-fire rifle that has a chance to apply a "Weaken" debuff, reducing enemy damage output.
• Streptomycin Shotgun: A wide-spread shotgun that excels at clearing crowds but has a long reload time.
• Laser Scalpel Beam: A continuous beam weapon that deals increasing damage the longer it stays on a single target.

These tools can be combined with existing upgrades. To optimize your loadout, check our Loadout Guide.

The Pathogen Nightmare Pack

This content pack introduces a new game mode: Nightmare Mode. This mode is separate from the standard difficulty settings and features modified enemy spawn patterns, exclusive elite variants, and a unique boss at the end of each wave. Successfully completing Nightmare Mode rewards players with exclusive cosmetic skins for their units.

The pack also adds three new elite enemy types to the base game, increasing overall challenge and variety. If you are struggling with these new threats, our Enemy Types guide provides detailed strategies.

How DLC Integrates with Progression

All DLC content is designed to integrate seamlessly with the game's existing progression and prestige systems. New characters and weapons can be upgraded using the same currency and resources found in the base game. Your Prestige Guide remains relevant for maximizing the potential of all DLC units.

Future DLC and Roadmap

The developer, Ijijanbos, has indicated plans for future DLC focusing on cooperative play and additional story-driven campaigns. While no specific dates have been announced, the success of the initial expansions suggests a continued commitment to expanding the Immunity Protocol universe. For the latest news, always check the official Patch Notes.

To stay updated on all upcoming content, including potential free updates and seasonal events, refer to our Event Guide.