Games like Ops
Games like Ops include Vampire Survivors, Timberman, Cyberhunt, Planes, Bullets and Vodka, and A Dance of Fire and Ice. We matched them by the tags players give Ops on Steam (Arcade, Casual, Combat, Aliens, and 2D): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: 2D · Casual · Arcade

Timberman
Shared: Casual · Arcade · 2D

Cyberhunt
Shared: Casual · Arcade · Action

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

A Dance of Fire and Ice
Shared: Arcade · 2D · Singleplayer

LUFTRAUSERS
Shared: Arcade · 2D · Indie

Bit Blaster XL
Shared: Arcade · Shoot 'Em Up · 2D

BALL x PIT
Shared: Arcade · Action · Shoot 'Em Up

Shower With Your Dad Simulator 2015: Do You Still Shower With Your Dad
Shared: Arcade · Casual · 2D

DJMAX RESPECT V
Shared: Casual · Action · Arcade

Peggle Deluxe
Shared: Casual · Arcade · 2D

Zuma's Revenge!
Shared: Casual · Arcade · Singleplayer

pureya
Shared: Arcade · Casual · 2D

One Finger Death Punch
Shared: Action · Indie · Singleplayer

To The Core
Shared: Casual · Arcade · 2D

One Finger Death Punch 2
Shared: Casual · Action · Indie

Geometry Wars: Retro Evolved
Shared: Arcade · Casual · 2D

MARVEL Tōkon: Fighting Souls
Shared: Casual · Arcade · Action

Waveform
Shared: Casual · Arcade · Indie

Polygoneer
Shared: Casual · Arcade · Shoot 'Em Up

Airscape - The Fall of Gravity
Shared: Casual · Shoot 'Em Up · Arcade

Sixtar Gate: STARTRAIL
Shared: Casual · Arcade · Action

Feeding Frenzy 2 Deluxe
Shared: Casual · Arcade · Singleplayer

Rogue Legacy 2
Shared: Arcade · Action · Indie