Games like Portal Buster

"Enemy Mind" is a side-scrolling space shooter for PC with a classic 8-bit art style and 8 levels of challenge across 70 waves. As a being of pure psychic energy, you can take over and control any of the 20+ unique ships you encounter, each with their own power and ability. The game features an adaptive story system that changes with your play style and offers multi-player co-op for up to four players. The soundtrack is an original chiptune-inspired creation by Rainbow Kitten.

In Azure Striker Gunvolt, play as a superhuman named Gunvolt with the power to control electricity, and fight to overthrow the evil Sumeragi Group in this 2D side-scrolling action game. Utilize your Conductor Gun and Flashfield abilities to take down enemies, and unleash powerful Voltaic Chains attacks for heavy-duty blasts. With challenging gameplay and special abilities to discover, the game provides a thrilling and electrifying experience.

The Contra Anniversary Collection is a compilation of classic Contra games from Konami, featuring 8 different titles from the iconic run-and-gun series. This collection includes both arcade and NES versions of the original Contra, Contra III: The Alien Wars, Contra: Hard Corps, and more. With its fast-paced action and challenging gameplay, Contra Anniversary Collection brings a piece of gaming history to modern platforms.

Syder Arcade is a fast-paced, old-school shoot 'em up game that pays homage to Amiga games of the 90s. It offers a challenging and uncompromised experience with no coins or grinding, focusing on player skill and dodging a barrage of enemy fire. With its fierce action and classic design, Syder Arcade provides a nostalgic trip back in time for seasoned players and a benchmark for newcomers to the genre.

Steredenn: Binary Stars is an award-winning rogue-like shoot'em up game with intense boss battles, randomly generated environments, and a vast arsenal of weapons. Experience quick, challenging sessions with upgrades and space events, available now on PC, Xbox One, PS4, Nintendo Switch, and iOS. Receive critical acclaim with user ratings around 90% on Steam and an average press rating of 8/10.

In "Alchemist's Castle," players explore a 2D side-scrolling world inspired by classic Metroidvania games, with the goal of stopping a power-hungry alchemist from using the philosopher's stone. The castle is filled with secrets to discover, adding a non-linear element to the old-school platforming experience. As the former apprentice of the alchemist, players must use their skills to survive and complete their mission.

"SATAZIUS" is a single-player Science Fiction Shooter game set in 2051 on the abandoned planet SATAZIUS. The player controls the assault ship 'Trafalgar', the last hope for destroying a space pirate base after their attack on the cruiser Agano. With 13 upgradeable weapons, power-ups, and intense boss encounters, SATAZIUS brings an old-school side-scrolling arcade shooter experience with impressive graphics and game mechanics.

"Eldest Souls" is a pixel-art boss-rush game where players face off against the Old Gods, who have been imprisoned for ages. As a lone warrior, players must utilize their skill, timing, and strategy to defeat these powerful beings in intense, adrenaline-fueled battles. With each victory, players can upgrade their character and gear, adding a layer of RPG elements to the gameplay. The game promises a challenging and rewarding experience for fans of difficult action games.

"Strider" is a single-player Science Fiction Hack and Slash game featuring Strider Hiryu, the original assassin, in a massive interconnected world with lightning fast combat and a variety of weapons, including the indestructible plasma charged cypher. The game boasts amazing mechanics, stunning graphics, and an exceptional soundtrack, but contains some bugs and requires grinding. Its beautiful level design and seamless traversal options make for exceptional replayability.

"Ocean's Heart" is a top-down action adventure game with RPG elements. Players explore a vast ocean, uncovering secrets and battling enemies as they search for their missing father. The game features crafting, character development, and underwater exploration with a charming pixel art style.