Games like Myriavora
Games like Myriavora include Risk of Rain 2, Megabonk, Hades, HELLDIVERS™ 2, and Warframe. We matched them by the tags players give Myriavora on Steam (Action Roguelike, Third-Person Shooter, Roguelite, Action, and Shooter): closest matches first, and among equally close ones the better-known games.

Risk of Rain 2
Shared: Action Roguelike · Third-Person Shooter · Roguelite

Megabonk
Shared: Action Roguelike · Roguelite · Action

Hades
Shared: Action Roguelike · Roguelite · Action

HELLDIVERS™ 2
Shared: Third-Person Shooter · Shooter · Action

Warframe
Shared: Third-Person Shooter · Action · Third Person

Crab Champions
Shared: Action Roguelike · Third-Person Shooter · 3D

Vampire Survivors
Shared: Action Roguelike · Roguelite · Action

Hades II
Shared: Action · Roguelite · Action Roguelike

Gunfire Reborn
Shared: Roguelite · Action Roguelike · Action

Soulstone Survivors
Shared: Action Roguelike · Roguelite · Action

Roboquest
Shared: Action Roguelike · Roguelite · Shooter

LORT
Shared: Action Roguelike · Third-Person Shooter · Roguelite

Skul: The Hero Slayer
Shared: Action Roguelike · Action · Roguelite

Grand Theft Auto V Legacy
Shared: Action · Shooter · Third Person

Warhammer 40,000: Space Marine - Anniversary Edition
Shared: Third-Person Shooter · Action · Third Person

PUBG: BATTLEGROUNDS
Shared: Shooter · Third-Person Shooter · Action

STAR WARS™ Battlefront™ II
Shared: Third-Person Shooter · Shooter · Action

Warhammer 40,000: Space Marine 2
Shared: Third-Person Shooter · Action · Third Person

STAR WARS™ Battlefront II (Classic, 2005)
Shared: Action · Third-Person Shooter · Shooter

ARMORED CORE™ VI FIRES OF RUBICON™
Shared: Action · Character Customization · Third Person

Aliens: Fireteam Elite
Shared: Third-Person Shooter · Shooter · Action

EVERSPACE™
Shared: Action Roguelike · Action · Roguelite

ARC Raiders
Shared: Third-Person Shooter · Shooter · Third Person

The Callisto Protocol™
Shared: Third-Person Shooter · Shooter · Sci-fi