Games like WALLOP
Games like WALLOP include Megabonk, Deep Rock Galactic: Survivor, Soulstone Survivors, Yet Another Zombie Survivors, and Hades. We matched them by the tags players give WALLOP on Steam (Bullet Heaven, Action Roguelike, Roguelite, Action, and Arcade): closest matches first, and among equally close ones the better-known games.

Megabonk
Shared: Bullet Heaven · Action Roguelike · Roguelite

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

Soulstone Survivors
Shared: Bullet Heaven · Action Roguelike · Roguelite

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

Hades
Shared: Action Roguelike · Roguelite · Action

BALL x PIT
Shared: Roguelite · Action · Arcade

Vampire Survivors
Shared: Action Roguelike · Roguelite · Arcade

Halls of Torment
Shared: Action Roguelike · Roguelite · Action

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

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

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

Shape of Dreams
Shared: Action Roguelike · Roguelite · Action

Brotato
Shared: Action Roguelike · Bullet Heaven · Roguelite

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

Antivirus Survivors 2003 Professional
Shared: Bullet Heaven · Action Roguelike · Roguelite

Sephiria
Shared: Action Roguelike · Roguelite · Action

Nova Drift
Shared: Roguelite · Action Roguelike · Arcade

Spirit Hunters: Infinite Horde
Shared: Bullet Heaven · Action Roguelike · Roguelite

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

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

20 Minutes Till Dawn
Shared: Action Roguelike · Roguelite · Combat

Project Lazarus
Shared: Action Roguelike · Action · Bullet Heaven

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

Boneraiser Minions
Shared: Action Roguelike · Roguelite · Bullet Heaven