Games like Interstellar Sentinel
Games like Interstellar Sentinel include ICEY, Zombotron, DOOM: The Dark Ages, Bit Blaster XL, and DRAINUS. We matched them by the tags players give Interstellar Sentinel on Steam (2D, Action, Side Scroller, Shoot 'Em Up, and Demons): closest matches first, and among equally close ones the better-known games.
ICEY
Shared: Action · Side Scroller · 2D
Zombotron
Shared: 2D · Action · Shoot 'Em Up
DOOM: The Dark Ages
Shared: Action · Demons · Dark Fantasy
Bit Blaster XL
Shared: Shoot 'Em Up · 2D · Bullet Hell
DRAINUS
Shared: Action · Shoot 'Em Up · 2D
Jets'n'Guns Gold
Shared: Shoot 'Em Up · Side Scroller · Action
Guns, Gore and Cannoli 2
Shared: Action · Side Scroller · 2D
Broforce
Shared: Action · 2D · Side Scroller
ASTLIBRA Revision
Shared: 2D · Side Scroller · Action
The Vagrant
Shared: Action · 2D · Side Scroller
Huntdown
Shared: Side Scroller · Action · 2D
Guns, Gore & Cannoli
Shared: Action · 2D · Side Scroller
METAL SLUG
Shared: Action · 2D · Side Scroller
Revolution Ace
Shared: Action · Shoot 'Em Up · Bullet Hell
Eastern Exorcist
Shared: Action · 2D · Side Scroller
Nova Drift
Shared: Shoot 'Em Up · Bullet Hell · 2D
Intrusion 2
Shared: Action · 2D · Side Scroller
Touhou Juuouen 〜 Unfinished Dream of All Living Ghost.
Shared: Action · Shoot 'Em Up · 2D
ZeroRanger
Shared: Shoot 'Em Up · Action · 2D
Vampire Survivors
Shared: 2D · Bullet Hell · Action
Jets'n'Guns 2
Shared: Action · Shoot 'Em Up · Side Scroller
TouHou Makuka Sai ~ Fantastic Danmaku Festival Part III
Shared: Shoot 'Em Up · Bullet Hell · Action
Touhou Koumakyou: New Classic - the Embodiment of Scarlet Devil
Shared: Shoot 'Em Up · Action · Bullet Hell
LUFTRAUSERS
Shared: Action · 2D · Bullet Hell