Games like Nienix: Cosmic Warfare
Games like Nienix: Cosmic Warfare include Warframe, Destiny 2, Borderlands 4, Escape From Duckov, and EVERSPACE™ 2. We matched them by the tags players give Nienix: Cosmic Warfare on Steam (Looter Shooter, Top-Down Shooter, Bullet Hell, Flight, and PvE): closest matches first, and among equally close ones the better-known games.

Warframe
Shared: Looter Shooter · Action RPG · RPG

Destiny 2
Shared: Looter Shooter · PvE · PvP

Borderlands 4
Shared: Looter Shooter · PvE · Action RPG

Escape From Duckov
Shared: Looter Shooter · Top-Down Shooter · Shooter

EVERSPACE™ 2
Shared: Looter Shooter · Shooter · Action RPG

Borderlands 2
Shared: Looter Shooter · Shooter · Action

The First Descendant
Shared: Looter Shooter · Shooter · RPG

Tom Clancy’s The Division® 2
Shared: Looter Shooter · Shooter · Open World

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

Relic Hunters Legend
Shared: Looter Shooter · Action RPG · Top-Down Shooter

Relic Hunters Zero: Remix
Shared: Looter Shooter · Top-Down Shooter · Bullet Hell

OUTRIDERS
Shared: Looter Shooter · RPG · Shooter

Tom Clancy’s The Division™
Shared: Looter Shooter · Shooter · RPG

Borderlands 3
Shared: Looter Shooter · RPG · Shooter

Tiny Tina's Wonderlands
Shared: Looter Shooter · Shooter · RPG

Deep Rock Galactic: Survivor
Shared: Bullet Hell · Top-Down Shooter · PvE

Alien Shooter 2: Reloaded
Shared: Looter Shooter · PvE · Shooter

Pathogenic
Shared: Top-Down Shooter · Bullet Hell · Shooter

The Elder Scrolls Online - Standard Edition
Shared: RPG · PvP · PvE

ARC Raiders
Shared: PvE · PvP · Shooter

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

Diablo® IV
Shared: Action RPG · RPG · PvE

GrandChase
Shared: PvE · PvP · Action RPG

Deep Rock Galactic
Shared: PvE · Shooter · Looter Shooter