Games like Shillelagh

"ODIA is a single-player shooter game with a slow, deliberate pace, inspired by early first-person shooters. As a demonic force, wield a bone-rifle and shield to fight your way through the Gottheim army and ascend the citadel. Grinding is required to unlock your march forward, as you scour the land and slaughter enemies for keys to victory."

"Devil Daggers" is a single-player horror shooter game with compelling gameplay, awesome visuals, and fantastic music. Armed with versatile magic daggers, players face endless legions of demons and harvest crystals to increase their power in an abyssal arena. The game features fluid movement, advanced techniques, 13 horrifying enemies, leaderboard rankings, and a custom-built engine with 90's-style rendering. The lackluster story and grinding aspects are overshadowed by the fast-paced and hilarious dense atmosphere, making it highly replayable.

PixelJunk™ Monsters Ultimate is a tower defense game where players protect Tikiman and his tribe from enemy hordes. This ultimate edition includes all content from the original game, as well as extra levels, tower types, and enemies. The goal is to strategically place and upgrade towers to stop the waves of colorful critters.

"Crossbow: Bloodnight" is a first-person shooter game that takes place in a sprawling, procedurally generated city. Players take on the role of a vigilante armed with a powerful crossbow, using stealth and precision to take down enemies and survive the night. With a range of upgrades and customization options, players can tailor their playstyle to their liking in this intense, fast-paced action game.

"Chippy" is a twin-stick bullet-hell shooter with exceptional mechanics, fabulous graphics, and spectacular music. Play solo or with a friend in local co-op, challenging 14 bosses in a race for the fastest time. With power-ups, leaderboards, replays, and Workshop support, this game offers a variety of ways to experience its pixel-by-pixel destruction system. New Easy and Nightmare modes provide additional difficulties to master.

"Jet Gunner" is a fast-paced, side-scrolling shooter game that features intense action and vintage graphics. As a mercenary named Sinclair, players must navigate through various levels while battling against hordes of enemies and powerful bosses. With a wide range of weapons and special abilities, players can customize their playstyle and strategize to overcome challenges. The game also includes local co-op mode for up to 4 players.

Fast-paced rogue-lite shooter. Gatekeeper: Eclipse is a prologue ver. of the game Gatekeeper. Go on a quest to find the stolen Heart of the Universe and shoot your way through the hordes of machine enemies in solo or in co-op with friends!

Color Symphony is basically a side scrolling game. But it has the added element of color and gives you something different. You can be a main character in the game and fight the enemy, eliminate the obstacles or find a new route by using color.

"David" is a challenging single-player platformer game featuring wonderful gameplay and pretty visuals. As the character David, players use a slingshot-esque gift to fight against giant physics-based enemies in a 9-level campaign, with additional levels, a survival mode, and a secret basketball minigame. The game includes a six-song EP soundtrack, described as FEZ-like and wonderful.

It's a twin-stick vertical scrolling Shooter hybrid with a cinematic flare: An unrelenting onslaught of eye-popping visuals, ear bursting soundscapes and mind-melting action makes Cygni the vanguard for the next generation of shoot-em ups.