Games like Alien Infection

"Nation Red" is an adrenaline-pumping zombie shooter game, where you battle thousands of zombie mutants and their bosses in frenetic close-quarters combat. It offers three play modes, various perks, and multiplayer options. The game's narrative unfolds in a world where scattered groups of zombies were once a threat, only to re-emerge in the present day. Your mission: exterminate them before history repeats itself.

"Guns n Zombies" is a thrilling post-apocalyptic game where you fight against hordes of robotized zombies infected by a nano-virus. With a variety of weapons, special abilities, and turrets, you'll embark on a dangerous journey through a randomly generated gameplay. The survival mode allows you to challenge yourself and compete with other Steam players, all while experiencing a true post-apocalyptic atmosphere.

"Gene Shift Auto" is a unique racing game that combines elements of racing and puzzle-solving. Players can shift between different genes, each with unique abilities, to navigate through various tracks and obstacles. The game also features both single-player and multiplayer modes, allowing players to compete against AI or other players online. With its vibrant graphics and innovative gameplay, "Gene Shift Auto" offers a fresh take on the racing genre.

"Over 9000 Zombies!" is a frenetic first-person shooter where players must survive waves of zombies in various maps. Utilize a wide range of weapons, from pistols to grenade launchers, to annihilate the undead hordes and progress through the game's challenges. With online co-op mode, team up with friends to exterminate the zombie menace together. Fight for survival and prove your mettle against over 9000 zombies!

VoidExpanse is a science fiction action-RPG set in deep space, allowing players to explore procedurally-generated galaxies, engage in real-time combat, and interact with dynamic factions. The game features complex mechanics for mining, trading, and character customization, as well as a meaningful storyline and options for both single and multiplayer gameplay. Upgrade your ship, complete missions, and advance through diverse skill-trees in this open-world space adventure.

"It Came From Space, and Ate Our Brains" is a top-down zombie shooter where players fend off endless waves of undead using a variety of weapons. The full version offers more levels, diverse armaments, a cooperative multiplayer mode, and care packages to aid survival. It’s a fast-paced, action-packed experience focused on intense, cooperative zombie combat.

In "Tesla vs Lovecraft" , play as Nikola Tesla, harnessing static energy to power up your Tesla-Mech and combat Lovecraft's monstrous army. Utilize your inventions, such as Quantum Teleportation, to turn the tables on his nightmarish creatures and prevent their reign of terror. This intense top-down shooter promises a challenging and exhilarating experience.

Tiny Troopers is a thrilling spiritual prequel to the twin-stick shooter, Tiny Troopers: Global Ops. Command a team of small soldiers through 30 deadly missions, facing various objectives and enemies. Upgrade your troopers' abilities and equipment to increase their chances of survival, as the casualty rate is high and fresh recruits are always available.

"XenoRaptor is a Science Fiction Shooter game where players control cyberdragons, annihilating enemies in high-speed, skill-based action. The game features 2-player local co-op and up to 8-player online multiplayer. Design your own weapons and engage in strategic combat against cunning AI enemies, with the ultimate challenge of taking down massive bosses."

"X Invader" is a challenging 2D pixel art shoot 'em up game. Blast through hordes of alien invaders, collect power-ups, and dodge their projectiles in fast-paced action. With multiple difficulty options and a survival mode, there's plenty of replayability for both casual and hardcore players.