Games like REDSIDE episode 1
Games like REDSIDE episode 1 include Escape From Duckov, Hotline Miami, Hotline Miami 2: Wrong Number, UFO 50, and RUNNING WITH RIFLES. We matched them by the tags players give REDSIDE episode 1 on Steam (Action, Top-Down Shooter, Cold War, 1980s, and Adventure): closest matches first, and among equally close ones the better-known games.

Escape From Duckov
Shared: Action · Adventure · Top-Down Shooter

Hotline Miami
Shared: Action · 1980s · Pixel Graphics

Hotline Miami 2: Wrong Number
Shared: Action · Pixel Graphics · 1980s

UFO 50
Shared: Action · Arcade · Adventure

RUNNING WITH RIFLES
Shared: Action · Top-Down Shooter · Wargame

Broforce
Shared: Action · Pixel Graphics · Shooter

Cyberhunt
Shared: Action · Adventure · Arcade

Five Nights at Freddy's: Into the Pit
Shared: Adventure · 1980s · Action

Exit the Gungeon
Shared: Action · Adventure · Arcade

12 is Better Than 6
Shared: Action · Top-Down Shooter · Shooter

BALL x PIT
Shared: Action · Top-Down Shooter · Arcade

The Ascent
Shared: Top-Down Shooter · Action · Shooter

Relic Hunters Zero: Remix
Shared: Action · Top-Down Shooter · Adventure

BioShock Infinite
Shared: Action · Shooter · Adventure

Cleared Hot
Shared: Action · 1980s · Top-Down Shooter

Halo: Spartan Assault
Shared: Action · Top-Down Shooter · Shooter

Kung Fury: Street Rage - Ultimate Edition
Shared: Action · Arcade · 1980s

SANABI
Shared: Action · Adventure · Pixel Graphics

Grand Theft Auto V Legacy
Shared: Action · Adventure · Shooter

Call of Duty®: Black Ops
Shared: Action · Cold War · Shooter

Counter-Strike 2
Shared: Action · Shooter · Military

WARNO
Shared: Wargame · Cold War · Action

Commando Collection
Shared: Action · Shooter · Arcade

WARDOGS
Shared: Action · Wargame · Shooter