Games like Marimo-VS-IAS
Games like Marimo-VS-IAS include Planes, Bullets and Vodka, My Friend Pedro, Bit Blaster XL, Huntdown, and Broforce. We matched them by the tags players give Marimo-VS-IAS on Steam (Shooter, Casual, Side Scroller, Shoot 'Em Up, and Action): closest matches first, and among equally close ones the better-known games.

Planes, Bullets and Vodka
Shared: Casual · Shoot 'Em Up · Action

My Friend Pedro
Shared: Shooter · Action · Side Scroller

Bit Blaster XL
Shared: Shooter · Shoot 'Em Up · Casual

Huntdown
Shared: Shooter · Side Scroller · Action

Broforce
Shared: Action · Shooter · Side Scroller

Zombotron
Shared: Action · Shooter · Shoot 'Em Up

DRAINUS
Shared: Shooter · Shoot 'Em Up · Action

Guns, Gore and Cannoli 2
Shared: Side Scroller · Action · Shooter

Guns, Gore & Cannoli
Shared: Side Scroller · Action · Shoot 'Em Up

Soda Crisis
Shared: Side Scroller · Shooter · Shoot 'Em Up

RADical ROACH Remastered
Shared: Casual · Action · Shoot 'Em Up

BioShock Infinite
Shared: Shooter · Action · Singleplayer

Aimlabs
Shared: Shooter · Action · Score Attack

METAL SLUG
Shared: Action · Side Scroller · Shoot 'Em Up

Alex Jones: NWO Wars
Shared: Shooter · Action · Shoot 'Em Up

KovaaK's
Shared: Shooter · Action · Indie

Just Cause™ 3
Shared: Action · Shooter · Destruction

State of Anarchy
Shared: Casual · Action · Shoot 'Em Up

ShellShock Live
Shared: Shooter · Action · Casual

Call of Duty®
Shared: Shooter · Action · Singleplayer

Intrusion 2
Shared: Action · Shooter · Side Scroller

Counter-Strike 2
Shared: Shooter · Action

DEVIL BLADE REBOOT
Shared: Shooter · Shoot 'Em Up · Action

Call of Duty®: Modern Warfare® 3 (2011)
Shared: Shooter · Action · Casual