Games like Alcyon Infinity
Games like Alcyon Infinity include Sky Force Reloaded, Broforce, BALL x PIT, Enter the Gungeon, and Vampire Survivors. We matched them by the tags players give Alcyon Infinity on Steam (Action, Top-Down Shooter, Bullet Hell, Local Co-Op, and Local Multiplayer): closest matches first, and among equally close ones the better-known games.

Sky Force Reloaded
Shared: Bullet Hell · Top-Down Shooter · Action

Broforce
Shared: Action · Local Co-Op · Local Multiplayer

BALL x PIT
Shared: Action · Bullet Hell · Top-Down Shooter

Enter the Gungeon
Shared: Bullet Hell · Local Co-Op · Action

Vampire Survivors
Shared: Bullet Hell · Action · Local Co-Op

Nuclear Throne
Shared: Action · Bullet Hell · Top-Down Shooter

Streets of Rage 4
Shared: Action · Local Multiplayer · Local Co-Op

Relic Hunters Zero: Remix
Shared: Action · Top-Down Shooter · Bullet Hell

Huntdown
Shared: Action · Local Co-Op · Side Scroller

METAL SLUG
Shared: Action · Arcade · Side Scroller

Nex Machina
Shared: Action · Bullet Hell · Arcade

Geometry Wars™ 3: Dimensions Evolved
Shared: Action · Bullet Hell · Local Co-Op

HELLDIVERS™ Dive Harder Edition
Shared: Top-Down Shooter · Action · Local Co-Op

DoDonPachi Resurrection
Shared: Top-Down Shooter · Bullet Hell · Action

LUFTRAUSERS
Shared: Bullet Hell · Action · Arcade

Pathogenic
Shared: Top-Down Shooter · Bullet Hell · Local Co-Op

Revolution Ace
Shared: Action · Bullet Hell · Local Co-Op

Chippy
Shared: Bullet Hell · Top-Down Shooter · Action

METAL SLUG 3
Shared: Action · Arcade · Local Co-Op

Voidigo
Shared: Local Co-Op · Bullet Hell · Top-Down Shooter

Blazing Beaks
Shared: Top-Down Shooter · Action · Local Co-Op

Bit Blaster XL
Shared: Bullet Hell · Action · Arcade

Ikaruga
Shared: Bullet Hell · Action · Arcade

Door Kickers: Action Squad
Shared: Action · Local Co-Op · Simulation