Games like Flak Duty
Games like Flak Duty include Aliya: Timelink, The Life and Suffering of Sir Brante, OPUS: Echo of Starsong - Full Bloom Edition, Tiny Bunny, and Coffee Talk. We matched them by the tags players give Flak Duty on Steam (Interactive Fiction, Visual Novel, Sci-fi, Story Rich, and Text-Based): closest matches first, and among equally close ones the better-known games.

Aliya: Timelink
Shared: Interactive Fiction · Visual Novel · Sci-fi

The Life and Suffering of Sir Brante
Shared: Interactive Fiction · Story Rich · Visual Novel

OPUS: Echo of Starsong - Full Bloom Edition
Shared: Visual Novel · Story Rich · Interactive Fiction

Tiny Bunny
Shared: Visual Novel · Story Rich · Atmospheric

Coffee Talk
Shared: Visual Novel · Interactive Fiction · Story Rich

Florence
Shared: Story Rich · Casual · Interactive Fiction

A Bird Story
Shared: Story Rich · Interactive Fiction · Visual Novel

Until Then
Shared: Visual Novel · Interactive Fiction · Story Rich

Suzerain
Shared: Visual Novel · Interactive Fiction · Story Rich

STEINS;GATE
Shared: Visual Novel · Story Rich · Sci-fi

Neo Cab
Shared: Visual Novel · Interactive Fiction · Story Rich

The Hungry Lamb: Traveling in the Late Ming Dynasty
Shared: Visual Novel · Interactive Fiction · Story Rich

Vampire: The Masquerade - Coteries of New York
Shared: Visual Novel · Interactive Fiction · Story Rich

Mirror 2: Project X
Shared: Visual Novel · Interactive Fiction · Story Rich

Doki Doki Literature Club Plus!
Shared: Visual Novel · Story Rich · Interactive Fiction

To the Moon
Shared: Story Rich · Interactive Fiction · Indie

No Case Should Remain Unsolved
Shared: Interactive Fiction · Visual Novel · Story Rich

I Wani Hug that Gator!
Shared: Visual Novel · Story Rich · Interactive Fiction

Analogue: A Hate Story
Shared: Visual Novel · Sci-fi · Interactive Fiction

Far Away
Shared: Visual Novel · Story Rich · Interactive Fiction

Slay the Princess — The Pristine Cut
Shared: Visual Novel · Story Rich · Interactive Fiction

The NOexistenceN of you AND me
Shared: Visual Novel · Interactive Fiction · Story Rich

Noctuary
Shared: Interactive Fiction · Visual Novel · Story Rich

Dagon: by H. P. Lovecraft
Shared: Visual Novel · Story Rich · Atmospheric