Survive an endless undead horde in this brutal auto-battling roguelike. Slash, upgrade, and evolve your arsenal as chaos unfolds to the pulse of an industrial metal soundtrack. Contagion Protocol is fast, bloody, and built for replayability.
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Every appinfo change SteamRaw has observed, grouped by changelist. Tags, features, languages, builds, depots, prices and any other key Steam publishes. Tracking since at least 12 September 2026 05:53 UTC (estimated from the earliest recorded change; the exact first fetch was not stored).
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18 March 2026 18:14 UTC · Community Announcements · Paratrooper82
ːsteamhappyː Hey everyone — it’s been a while since the last devlog (November), but behind the scenes Contagion Protocol has had a big stretch of progress. Over the past few months, I’ve been building the core “run loop” that ties everything together:Survive → hunt a boss → unlock FINAL extraction → extract to secure rewards → return to the Safehouse to upgrade.Here’s what’s new since November.The Safehouse Has Become a Real Meta Progression HubThe Safehouse is no longer just a menu - it’s now the long-term upgrade backbone of the game.A full skill tree with connected paths, progress lines, an
22 November 2025 12:04 UTC · Community Announcements · Paratrooper82
Zombie AI & Horde StabilityWhat’s NewThe entire enemy AI system is now stable and scalable.Fixed frozen zombies, walking-in-place bugs, and idle corpses standing upright.Zombies now chase properly, die facing the correct direction, and return to the pool cleanly when reused.Pathfinding is fully synchronized, and zombies now recalculate paths correctly during pooling.Performance BoostsAdded A.I. LOD tiers depending on distance to player.Offscreen zombies disable physics to reduce CPU usage.Created a cluster (hive-mind) system - one zombie leads, and nearby zombies follow its path.Result: 400–60
13 September 2025 13:41 UTC · Community Announcements · Paratrooper82
New: Shambler AI MovementWe’ve overhauled enemy movement for our standard zombie units. They now shuffle, stumble, and truly shamble their way toward you — giving off that slow-creeping horror feel while still posing a real threat in numbers.This new "shamble-walk" blend replaces the old default navigation and adds unsettling realism to how basic infected close the gap. It’s subtle, but deeply immersive.Horde Behavior ReworkSurviving the first 60 seconds used to be easy. Not anymore. We’ve introduced tiered horde escalation — enemies don’t just increase in number, they get smarter and faster o
31 July 2025 04:15 UTC · Community Announcements · Paratrooper82
🧠 Smarter Zombies: Pathfinding Overhaul CompleteNo more zombies dumbly faceplanting into walls.New A* Grid System: Custom-built from scratch to handle huge zombie swarms without lag.Obstacle Padding Logic: Prevents enemies from hugging colliders. Looks better, plays smoother.Zombie Collisions Disabled: Forget the awkward crowd-stuck shuffles — they pass through each other now, fluid and deadly.Script Cleanup: Obsolete systems like ZombiePathScheduler are gone. Simpler logic = better performance.Performance? We tested this thing on hordes hundreds strong — smooth like decapitated butter. 🧈🧟�
3 June 2025 16:40 UTC · Community Announcements · Paratrooper82
Hey survivors! 💀 Welcome to another scorching update from the pixelated apocalypse that is Contagion Protocol — our zombie-infested bullet-hell roguelite built with pure grit, heavy metal, and caffeine. This month, the horde mutated. Let’s break it down. 🧟♂️ New Enemy Type: Radioactive Zombie They don’t just bite — they spit. - Ranged Acid Attacks: These green-glowing freaks stay at a distance and fire toxic projectiles toward the player. - Projectile Logic: Acid orbs deal damage, glow with animated FX, and destroy themselves after a short lifespan. - Directional AI: Enemies now rotate and
5 May 2025 19:05 UTC · Community Announcements · Paratrooper82
🧟 Devlog #3 — Bombs, Freeze, and Tactical Mayhem Hey survivors! 🤘 Welcome back to another update on the development of Contagion Protocol — the pixel-art zombie-slaying bullet hell roguelike fueled by heavy metal and early-morning hustle. Let’s dive into the latest chaos we’ve been building: 🎮 Major Progress & Gameplay Updates ⚡ New Tactical Pickups: Bombs & Freeze Potions - Bomb Pickup: Instantly annihilates all zombies on screen. Massive screen flash + slow-motion effect for that satisfying “oh sht”* moment. https://clan.fastly.steamstatic.com/images/45576283/a6b343ee085de9042567bfff5ec6f
21 April 2025 18:37 UTC · Community Announcements · Paratrooper82
🧟 Devlog #2 — Weapons, Bugs, and Heavy Metal Hey survivors! 🤘 Welcome back to the second devlog for Contagion Protocol, the heavy-metal zombie-crushing roguelike. Development is still rolling full steam ahead (early mornings and late nights!), and here's what I've been hammering out since our last update: 🎮 Major Progress & Updates: ⚔️ Weapon Systems & Gameplay Improvements: - Orbiting Cleaver has been polished! It now cleanly spawns additional blades as you level up (capped at 5 blades). Each blade evenly spaces out around your character, ensuring smooth rotation and satisfying zombie carn
9 April 2025 16:05 UTC · Community Announcements · Paratrooper82
🧟 Devlog #1 — From Duty to Development Hey everyone 👋 Welcome to the very first devlog for Contagion Protocol — a solo-developed, heavy-metal, zombie-crushing roguelike built in the cracks of real life. My name is Jakob or Para82 and I’m currently active-duty military — an airborne infantryman by day, solo game developer by night (and very early morning). This game is a passion project I work on before sunrise and after my kids go to bed. It’s a grind — but it’s the dream. {STEAM_CLAN_IMAGE}/45576283/d7622e06bf322c44ff83e7756829032901355d41.png 🎮 What is Contagion Protocol? Contagion Protoc
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