Games like Mech vs. Bugs
Games like Mech vs. Bugs include Crab Champions, Risk of Rain 2, Warframe, Nova Drift, and Deep Rock Galactic: Survivor. We matched them by the tags players give Mech vs. Bugs on Steam (Action, Action Roguelike, Arcade, Shooter, and Arena Shooter): closest matches first, and among equally close ones the better-known games.

Crab Champions
Shared: Action Roguelike · Arcade · Looter Shooter

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

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

Nova Drift
Shared: Arcade · Action Roguelike · Bullet Hell

Deep Rock Galactic: Survivor
Shared: Action Roguelike · Bullet Hell · Action

Megabonk
Shared: Action Roguelike · Action · Bullet Hell

BALL x PIT
Shared: Action · Arcade · Action Roguelike

Vampire Survivors
Shared: Action Roguelike · Bullet Hell · Action

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

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

The First Descendant
Shared: Action · Looter Shooter · Third-Person Shooter

Escape From Duckov
Shared: Action · Shooter · Looter Shooter

Roboquest
Shared: Action Roguelike · Shooter · Action

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

Vanquish
Shared: Action · Shooter · Third-Person Shooter

Halls of Torment
Shared: Action Roguelike · Bullet Hell · Action

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

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

ACE COMBAT™ 7: SKIES UNKNOWN
Shared: Arcade · Shooter · Action

Arcadegeddon
Shared: Action · Arcade · Shooter

Enter the Gungeon
Shared: Action Roguelike · Bullet Hell · Action

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

Terminull Brigade™
Shared: Action Roguelike · Action · Third-Person Shooter

Black Gunner Wukong
Shared: Action Roguelike · Arena Shooter · Looter Shooter