Top similar games like Thetawave:

SURVIVE the swarm in this rogue-lite + survivors + asteroids mashup! Exterminate as many alien drones as you can. Upgrade your ship from the crafted deck of equipment and power-ups. You are the Last ship against the Endless... Will your choices be enough to overcome the thousands hunting you?

Nuclear Throne is a post-apocalyptic roguelike-like top-down shooter. Not 'the final hope of humanity' post-apocalyptic, but 'humanity is extinct and mutants and monsters now roam the world' post-apocalyptic. Fight your way through the wastelands with powerful weaponry, collecting radiation to mutate some new limbs and abilities.

Cultivation Story: Reincarnation is a top-down pixel art style action roguelike based on cultivation and Chinese mythology.

Beat up planets in Asterogues, a cosmic bullet hell shoot-em-up hybrid! Pick your character from a band of outcasts banished to the Asteroid Belt, dodge and shoot your way through a brutal onslaught of bullets, and take revenge against the Solar System!

Diary of Lucie is action-roguelite game made with RPG Maker. In addition to simply avoiding the enemy's barrage, strategically use the enemy's bullet to make the battle situation advantageous!

BroodStar is a classic arcade shmup with roguelike elements. Acquire crazy item combos, encounter strange events and fight challenging bosses on a quest to destroy the living planet, the BroodStar.

This is a rogue-like top-down shooter where you control a spaceship that is sent out to explore the caves on the Moon. Once you enter the caves, you find out that there are enemies. It is up to you to survive against them while also trying to find the path down to the next level of the caves.

A wave of irrational experimentation rushes toward you. Hurry up and mutate! evolution! Become scarier monsters than them! Use flesh and blood to bloom a way of survival! 24 characters, more than 80 kinds of organs, and endless build combinations！

Danger Gazers is a post-apocalyptic roguelite top-down shooter where you pave your own path. The choices you make will decide your fate, it will either turn you into the new ruler or... the ashes to be windswept away.

A mission-based top-down roguelike shooter where your main decision is: lead your AI-controlled team to victory, or use them as frag-meat...

Nightsteel Survivors is a 2D shooter with "roguelite" elements set in a dangerous robot-filled laboratory. Choose from various characters with unique abilities and face challenging bosses. Upgrade your skills and equipment to survive and escape the Nightsteel labyrinth.

⟪末卡未来⟫是一款2d像素风格的俯视角类幸存者游戏。末卡大陆正在遭受魔物的入侵，你必须抵御魔物一波又一波的进攻……

Cloak Hero is a rougelite dungeon crawler. Monsters and demons, swords and magic, skills and powers. A hero must rise to face challenges and fight through dungeons to save the kingdom and restore peace.

Broadside Renegades combines auto-firing weapons with manual ship abilities in a rogue-like space pirate adventure. Choose your captain and upgrade your ship to steal the space kings booty. Warp ahead to stay alive, and mind your bearing.

A top down 2D space shooter bullethell with roguelike elements awaits you. Dodge, weave and shoot your way through waves of enemies while gaining upgrades trying to survive as long as possible.

Fight as the owner of Hookscrap in a thrilling 2D rogue-like. Unleash the power of your Harpoon, by launching ships & asteroids at enemies. Upgrade your ship with loot from your foes, and become even stronger. Explore 5 unique levels in a randomly generated map & take down the fearsome SC Judgement!

Vile is an action rogue-lite about fighting demonic creatures and other horrors throughout a vile world. Fight enemies and/or complete random objectives given to you in procedurally-generated dungeons to put a stop to the creatures forever! Collect souls, find new weapons, new artifacts, and battle EPIC bosses!

Rush Rover is a 2D top-down shooter game. Compared to other similar games of the genre, the shooting experience is closer to traditional shoot'em up games. It includes random map generation, unique weapons, lots of different enemies, exciting boss battles and a dynamic chiptune soundtrack.

Fast-paced Action Rogue-like. Fight Hordes of Monsters and Bosses. Survive, Level Up, Upgrade Attributes and Skills.

Roguely is a fantasy themed top-down shooter pixel art action roguelite with some bullet hell thrown in. Fight and dodge your way through the randomly generated maps to rescue your friends. Find upgrades along the way and save up arcane fragments for permanent blessings from the gods.

Sealer of Dungeons is an action-shooter with Rogue-lite elements. Play Sealers on their journey, you will find great treasures and abilities to seal the unknown evil above. Gather precious loot, discover hidden secrets, and chat with merchants to get powerful items. Seal the dungeon, save the world!

Cards and Guns is a top-down arena shooter roguelite, where you’ll have to defeat hordes of creatures. Choose from a variety of cards and upgrades to create unique builds and survive to the end.

In this twin stick roguelite shooter, you play as one of the galactic mercenaries, explore a mysterious scientific complex and uncover the secret of the REPLIKATOR project.

Laser Tanks is a fast-paced top down shooter game where you battle against alien monsters across diverse environments using weapons and laser tanks. The game features wild monsters, numerous weapons, laser tanks to operate, and a never-ending Dungeon Survivor Mode for endless adventures.

Mighty Mage is a top-down arena shooter rogue-lite where you play a cute mage wielding up to 5 elemental spells at a time to fight off hordes of enemies. Choose from a variety of upgrades and spells to create unique builds.

Fight against an army of elemental creatures hell bent on your destruction. Compete with other players on the leaderboards to show who is the master of Repetendium !

Battle Planet - Judgement Day is a planetary rogue-lite top-down shooter. You are one of the universe's 3 most wanted criminals on the run, fighting your way through hordes of aliens, military and police units. There is only one way to reclaim your freedom - destroy them all...

Crush, smash, and eat thousands of enemies showing humanity what the meaning of destruction is! Kaiju Catastrophe is an arcade game with roguelite mechanics. Mutate devastating weapons, unlock permanent evolutions, and wreak havoc with a variety of monsters to tear humanity apart!

20 Minutes Till Dawn is a survival roguelite where endless hordes of creatures lurk from the dark. Craft an array of overpowering builds and eradicate waves of Lovecraftian nightmares. Will you be able to survive the night?

Bullet Bunny is a twin-stick shooter with rogue-like elements. Fend off an onslaught of enemies, level up, and create unique builds every run while trying to survive 500 seconds!

Peer beyond the veil and experience the ethereal in The Ghost and The Phoenix, a captivating neo-classical top-down shooter. Navigate the realms between life and death in this supernatural action-packed adventure.

With science as your super power, charge up your coils and zap into action! Tesla Force is a rogue-lite top-down shooter featuring endless procedural gameplay with tentacle splitting action. Play as Tesla, Curie, Lovecraft and Shelley and blast the cosmic horror back into the galactic abyss!

Steal everything you can and flee from the Burning Knight's castle in this action-packed roguelike! The game features tight bullet hell, tons of items, characters to meet... and secrets!

Embark on an epic saga in Asgard's Fall, a norse Arena-Shooter-Roguelite. Fight your way through hordes of creatures and let the gods feel your relentless wrath. How will your saga unfold?

Dungeon Souls is an action-adventure roguelike dungeon crawler which draws heavy inspiration from Nuclear Throne, Risk of Rain, and Overture. Explore vast procedurally generated dungeons, collect loot, and slay hordes of challenging enemies!