Top similar games like Contagion Protocol:

Endless Waves Survival is an adrenaline-fueled endless survival game. Fight a continuous onslaught of enemies and claim upgrades and new abilities as you level up. How long will you survive the next run?

Bangman is a top-down action roguelike in which you have to defeat hordes of bloodthirsty and cute monsters as you travel from world to world.

Explore dungeons, battle hordes of monsters, and defy fate in “Enter The Lost Chamber,” an action-packed pixel art roguelike. Discover new challenges, collect powerful weapons, and prepare to face the final boss at any time. Dive into the darkness!

Area Survivors is a top-down survival action game where you fight off relentless hordes of enemies and struggle to stay alive. Defeat enemies to grow stronger, upgrade your weapons and skills, and take on increasingly powerful foes and massive waves of enemies.

Fight against Hordes of Zombies, Skeletons and other creatures to survive as long as possible. Upgrade your arsenal and rescue other Survivors on your DESPERATE SURVIVAL.

A fast-paced bullet heaven action roguelike set in a futuristic arena. Face overwhelming enemy waves, evolve your build with powerful upgrades, and survive escalating instability that constantly reshapes the battlefield.

"KOTARO Survivor" is an auto-shooting roguelike action game.Defeat relentless waves of enemies, build the ultimate loadout, and survive the battlefield until the timer runs out!

"Epsilon Zero" is a fast-paced top-down action roguelike shooter where every mission is an all-out assault. Use devastating weapon combinations, unlock powerful upgrades, adapt your tactics, and exterminate everything standing in your way.

Ready to tackle the challenge? On Mars, confront countless mutated creatures and mechanical monsters. Choose survivors, weapons, and skills wisely for diverse battles. Employ precise shooting, agile dodging, and strategic use of props and skills to fend off enemy attacks.

A gothic top-down survivor-roguelite. Attack, weave and dodge through undead hordes while picking level-up cards to build your character, then fight a boss at the end of each map. Nine characters, dodge-only defense, run-based roguelite progression.

I Wanna Be The King! is a top-down roguelike arena shooter where you can use up to 6 allies as your weapons defeat waves of enemies. Customize your gameplay by selecting from a variety of allies and items, allowing for unique strategies and playstyles.

Creator’s Fall is an action roguelike with various classes, where you can choose between different paths. The goal is to reach and defeat the final boss at the end of the path. Levels are dynamically generated and feature different biomes. You can choose an upgrade after each level up.

Reject boring stat stacking! We've restructured the gameplay with limited talent resources—talent combinations are just as important as character selection! With 200+ items and 40+ pieces of equipment, what insane builds can you create? —Depth! Difficulty! And high replay value!

BLOODSAINT 2 is the most recent, barely playable, fast-paced, retro-hardcore, top-down arena-shooter minigame from Walter Machado.

Slaughter hordes of monsters, evolve your skills, and survive in this frantic action roguelite. Choose from 4 unique classes, unlock a devastating arsenal, and upgrade permanently to defeat the bosses of the lunar tide.

Choose your race and class, create a unique build, and battle relentless hordes in VERAKORIA. Collect experience, unlock powerful upgrades, defeat deadly bosses, and survive the escalating onslaught in this pixel-art action roguelite.

Dustbound is a deckbuilding survivors-like roguelite where you build your deck by finding lost treasure. Between waves of monsters take time to upgrade your cards and shape your character’s build—then dive back into the fight.

Spell Hell is a top-down arena roguelite where you play as a powerful wizard with advanced combo magics, to fight off hordes of monsters. Design your build with synergizing upgrades creating powerful combos, and defeat waves of enemies.

Challenge yourself to see how long you can last against endless waves of enemies, and discover hidden areas by completing tasks. Use the souls of your slayed enemies to unlock permanent upgrades to help you survive longer each run.

Top-down arena shooter roguelite where fallen Steam friends & Twitch chatters become your power. Control a squad, survive relentless waves and defeat powerful bosses. Compete on leaderboards! Bullet hell Brotato-like with wild builds, random events & high replayability.

Ping&Pong has a single goal: send the enemy’s own attack back at them. In this frenetic roguelite bullet hell, dodging isn’t enough! Move forward, intercept and deflect projectiles to survive, build your card setup and face increasingly chaotic hordes.

Dive into a top-down shooter where you’ll battle relentless waves of zombies, either solo or with friends! Face off against formidable bosses, unlock upgrades through a tech tree, and enjoy a casual gaming experience crafted with passion by an indie developer.

Serpent Squad is a bullet‑hell roguelike game where you control a snake‑shaped squad of heroes that automatically attacks nearby enemies. Combine different heroes to unlock class bonuses and create unique builds, guiding your unstoppable squad as it sweeps through endless waves of enemies.

Survive relentless enemy waves by broadcasting on risky frequencies. Upgrade, adapt, and defend your radio station in this post-apocalyptic top-down survival game.