Top similar games like Slime Mayhem:

Viking Survivors is an action roguelite where you wield ancient weapons and unleash Norse fury on endless waves of monsters. Survive the bullet hell, collect mythic weapons, and prove you're the ultimate Viking warrior in this thrilling survival game.

Spin. Shoot. Survive.

1000 Seconds is a roguelike – Defeat enemies, gather resources, and upgrade your orb to escape the temporal limbo, but you only have 1000 seconds to reach the end, so be as fast as possible.

Mow down thousands of night creatures and survive until dawn! Vampire Survivors is a gothic horror casual game with rogue-lite elements, where your choices can allow you to quickly snowball against the hundreds of monsters that get thrown at you. Be the bullet hell!

Defeat thousands of enemies that are invading Andromeda! Andromeda Survivors is a casual game with rogue-lite elements where you collect skills and upgrades for your ship to create amazing builds!

Space Miner is a shmup with roguelike elements and weapon customization. Destroy asteroids, collect different minerals to improve your ship, and discover new places on the galaxy!

Brew your own weapons from scratch and unleash them on hordes of homunculi! In this survival roguelite, every ingredient combination creates a potion that splashes, moves, and reacts in a unique way. Discover absurd synergies and rescue fellow alchemists in your quest for the Philosopher’s Stone.

A fast-paced, intense top-down bullet hell action experience with a sci-fi aesthetic. As a protector of light, you must build your arsenal of weapons, abilities, reflexes, and wits as you slowly transform into an unstoppable force to survive through waves of monsters and demons from the void.

Fight hordes of Covenant & Flood in this new game mixing Roguelite & Bullet Heaven for hours of mindless fun!

La Furia de las Trenzas is a survivor-like roguelite where you'll face relentless hordes of British soldiers trying to capture Buenos Aires. Recruit your platoon of soldiers with special abilities and defend the town square! 

Survive the relentless swarm in this arcade take on the Bullet Heaven/Survivors-like Action Roguelite. Slay 1000s of foes, level up, loot chests and make your character more powerful than ever. Unlock meta-progression upgrades and more heroes, so you can even the odds on future runs.

Unleash divine fury in this Ancient Greek twist on the Vampire Survivors formula! Play as one of 16 mighty gods, each with unique powers, battle endless waves of mythological creatures and legendary bosses. From harpies to hydras, can you survive?

A free-form arena-shooter Roguelite with heavy emphasis on building an overpowered character! You play as a little shape that shoots other shapes! Strengthen your character by mixing and matching mods and upgrades, and experiment with a limitless rune upgrade system!

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.

"Duck Dash" is a top-down arena shooter roguelite game. Players take on the role of a little duck and embark on a journey of growth, strategically selecting optimal skill combinations to become a mighty warrior.

Blast Head is a fast-paced action roguelite/bullet heaven with absurd weapons, powerful runes, and non-linear weapon skill trees. Dive into 10–30 minute runs, discover wild synergies, and unleash chaos across alien arenas.

Amass an army of undead to fight endless waves of heroes intent to end your boneraising ways! In this gothic auto-battler rogue-lite Survivor-like, use the bones of slain heroes to raise your minions, collect relics and spells, and unlock meta upgrades, all to survive King Gigald's crusade!

Meme hordes are attacking! Choose one of four heroes and survive 30 minutes in the hellish Bullet Hell Backrooms!

School Fighter is a top-down arena roguelite shooter where you play as a student who fights off school enemies using paper airplanes. You have access to a school shop, unique perks, and an upgrade station to help you create a powerful character and overcome the school nightmare!

A retro arcade style Top down shooting game. Shooting them with a machine gun, blasting them with missiles, dashing them with a vehicle, whipping them with an energy chain, or burning them with a napalm...No matter how you get it done, “ALIEN BUGS MUST DIE!”

Battle increasingly deadly hordes in an action-packed survivors-like with tower defense elements. Create unique builds, unlock and place towers, upgrade your character, and fight to defend the Kingdom of Stellara.

Defend against the alien invasion and take down the mother ship! Utilise branching upgrade trees, unlock new ships, and equip permanent upgrades to create your own unique build and defeat the growing hordes of invaders in this sci-fi action roguelike!

Kill monsters, Gather paws, then you will be stronger and stronger! Purrfect Survivors is a roguelite game, which you need to get runes and arrange them against the thousands of monsters. Every rune has its own ability and it shows completely different ability depending on where you arrange it.

Combat endless waves of spaceships as Cosmos Kitten in this physics-based action roguelite! Unlock combinations of unique characters with powerful weapons to overcome the onslaught of enemies. Compete or cooperate with friends in optional local multiplayer mode.

PlatinumS is a roguelite top-down arena shooter that brings the ultimate hero's party-building experience to life, empowering heroes to conquer dungeons. Players have the option to select from a range of items and buffs to craft their own distinctive builds.

Assemble a limitless arsenal in this survive-em-up roguelite shooter. As a Gun Manufacturer's testing force, your mission is simple: test the latest gun tech and scavenge alien planets. Collect insane weapon parts to invent crazy guns that slay thousands. You may not survive, but your guns will!

Alien Slayers is a roguelite time survival game where you hunt down hostile alien creatures on various planets. Grab your weapon and survive to the end to become the strongest alien.

Face challenging bosses and hordes of enemies in an action roguelike, using elemental weapons and unique combinations to master each cycle.

Fast paced Top-down shooter! Smartly use IRCM to evade the constant barrage of bullets and missiles and destroy everything that stands in your way.

Sidequest Survivors is a bullet-heaven roguelite where you control wacky characters, mow down waves of magical creatures, and tackle sidequests. Choose from a variety of weapons and create builds that match your playstyle.