Games like Vehicle No. 4
Games like Vehicle No. 4 include Megabonk, Vampire Survivors, Brotato, Hades, and Death Must Die. We matched them by the tags players give Vehicle No. 4 on Steam (Action Roguelike, Bullet Heaven, Vehicular Combat, Old School, and Roguelite): closest matches first, and among equally close ones the better-known games.

Megabonk
Shared: Action Roguelike · Bullet Heaven · Roguelite

Vampire Survivors
Shared: Action Roguelike · Roguelite · Roguelike

Brotato
Shared: Action Roguelike · Bullet Heaven · Roguelike

Hades
Shared: Action Roguelike · Roguelite · Action

Death Must Die
Shared: Action Roguelike · Roguelite · Bullet Heaven

Soulstone Survivors
Shared: Action Roguelike · Bullet Heaven · Roguelite

Tower of Babel: Survivors of Chaos
Shared: Action Roguelike · Bullet Heaven · Roguelite

Halls of Torment
Shared: Action Roguelike · Roguelite · Bullet Heaven

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

Nordic Ashes: Survivors of Ragnarok
Shared: Action Roguelike · Bullet Heaven · Roguelite

Boneraiser Minions
Shared: Action Roguelike · Roguelite · Bullet Heaven

Jotunnslayer: Hordes of Hel
Shared: Action Roguelike · Bullet Heaven · Roguelite

BALL x PIT
Shared: Roguelite · Action Roguelike · Action

The Spell Brigade
Shared: Bullet Heaven · Action Roguelike · Roguelite

Hades II
Shared: Action Roguelike · Roguelite · Action

Yet Another Zombie Survivors
Shared: Bullet Heaven · Action Roguelike · Roguelite

Astro Prospector
Shared: Action Roguelike · Roguelite · Bullet Heaven

The Binding of Isaac: Rebirth
Shared: Action Roguelike · Roguelike · Indie

Rogue: Genesia
Shared: Bullet Heaven · Action Roguelike · Roguelite

Deep Rock Galactic: Survivor
Shared: Action Roguelike · Bullet Heaven · Roguelite

20 Minutes Till Dawn
Shared: Action Roguelike · Roguelite · Bullet Heaven

Risk of Rain 2
Shared: Action Roguelike · Roguelite · Action

Dead Cells
Shared: Action Roguelike · Roguelike · Roguelite

Dungreed
Shared: Action Roguelike · Roguelite · Action