Games like Antivirus Girl
Games like Antivirus Girl include Muse Dash, MiSide, Bright Memory: Infinite, Cavalry Girls, and Magical Girl Witch Trials. We matched them by the tags players give Antivirus Girl on Steam (Tower Defense, Shooter, Story Rich, Sexual Content, and Female Protagonist): closest matches first, and among equally close ones the better-known games.

Muse Dash
Shared: Sexual Content · Anime · Female Protagonist

MiSide
Shared: Story Rich · Sexual Content · Anime

Bright Memory: Infinite
Shared: Sexual Content · Female Protagonist · Shooter

Cavalry Girls
Shared: Shooter · Tower Defense · Anime

Magical Girl Witch Trials
Shared: Female Protagonist · Story Rich · Sexual Content

SENRAN KAGURA Peach Beach Splash
Shared: Sexual Content · Female Protagonist · Anime

Strinova
Shared: Sexual Content · Shooter · Anime

Tricolour Lovestory
Shared: Sexual Content · Anime · Story Rich

Danganronpa Another Episode: Ultra Despair Girls
Shared: Female Protagonist · Story Rich · Anime

Mirror 2: Project X
Shared: Female Protagonist · Anime · Story Rich

Half-Life: Alyx
Shared: Story Rich · Shooter · Female Protagonist

Bloons TD 6
Shared: Tower Defense · Strategy · Casual

Snowbreak: Containment Zone
Shared: Shooter · Anime · Sexual Content

Bright Memory
Shared: Shooter · Female Protagonist · Anime

Children of the Sun
Shared: Shooter · Arcade · Strategy

Volcano Princess
Shared: Female Protagonist · Anime · Story Rich

Dispatch
Shared: Story Rich · Sexual Content · Strategy

Panty Party
Shared: Sexual Content · Anime · Story Rich

LEWDAPOCALYPSE Hentai Evil
Shared: Sexual Content · Female Protagonist · Anime

The Killing Antidote
Shared: Sexual Content · Female Protagonist · Shooter

Cluckmech Oasis
Shared: Tower Defense · Strategy · Shooter

ACE COMBAT™ 7: SKIES UNKNOWN
Shared: Shooter · Arcade · Story Rich

Creeper World 4
Shared: Tower Defense · Strategy · Real Time Tactics

Lost
Shared: Sexual Content · Casual · Strategy