Games like Periscope Up

Hyper Simon X is an Arcade Shoot 'Em Up Puzzle game, blending SHMUP mechanics with 'Simon Says' memory games. Players must destroy enemies in a specific sequence to progress, with levels increasing in complexity. Combo scores can be earned by annihilating other ships while following the sequence, but players must avoid enemy fire and wrong color hits. The game offers retro pixel art graphics, multiple control options, and an original soundtrack .

Dive into the deep virtual waters and become a SeaWolf. Shoot your missiles and torpedoes at hostile submarines, minesweepers and tankers, actively avoid depth charges and enemy torpedoes, use defensive shield while trying to protect sea animals. Think strategically, manage your ammo wisely, don't take unnecessary risks and try to survive to the last level and achieve the maximum score! If yo…

"Aqua Kitty: Milk Mine Defender" is a fast-paced, retro-style shoot-em-up game. Players protect a school of cat milkmen from robotic enemies while they extract milk from the ocean floor. With upgradeable weapons, power-ups, and multiple levels, it's a challenging and fun experience for fans of classic arcade games.

"Artificial Extinction" is a Sentry Defense game with Real Time Strategy elements, played from a First Person perspective. In the future, you play a colonist searching for a peaceful planet, only to find that the AI-driven terra-forming robots have turned hostile. With just 9 days to find a safe location, can you protect yourself and prepare for your family's arrival? The game tackles relevant topics such as AI development, LAWS, and military robotics.

In TeraBlaster, take charge of a rogue spaceship and engage in a relentless battle against endless waves of enemies, with classic top-down shooter mechanics and procedurally generated environments. With ruthless destruction of foes and enemies, the game offers an addictive and compelling experience while you listen to its gloriously retro soundtrack. Immerse yourself in the philosophical and quirky backstory, and try to survive as long as possible in this fast-paced action roguelike.

----------------------------------------------------------------------------- BASIC CONTROLS Trench Warfare is a WW1 era-style top-down shooter which aims to cover multiple famous battles from the notorious great war! Movement = WASD and ARROW KEYS Change Inventory = E Forward, Q Backward Shoot / Attack = Mouse 0 (Left Click) (Firearms and Knife only) Dash = Space Bar (Can also hold to run) Reload…

Horizon Shift is an explosive wave based, single screen shooter, with a ton of new ideas and platformer elements. Do what it takes to protect your horizon from the ever encroaching enemy attack! Use the unique risk reward multiplier system to maximise power-ups, build your bomb and destroy EVERYTHING!

STORY An interstellar war is raging between systems, scattered across the galaxy but connected by Ring Gates between them. You have evidence that could end the war, but no one can be trusted. You'll have to fly deep into enemy territory through the Ring Gates in hopes that you can deliver this crucial package to their home planet directly. The deeper you go into the enemy's territory, one ring a…

Introduction In the distant future, humanity took to the stars. It is at this time they faced a crisis of their own making. A supercomputer AI named Nadine went rogue after going online, taking control over much of our space forces. War had broken out, pitting human against controlled machines for Nadine's calculated plans against us. We require a solution to deal with Nadine, quickly, before it …

Hidden Deep is a 2D sci-fi thriller game set in a sub oceanic mining and research facility, where you lead a team to discover what happened to the previous researchers who went missing. Utilize specialized equipment, give orders to your team, and defend against horrific alien life forms and other unknown dangers. The game features multiple game modes, including a single-player option.