Games like Monday Syndrome
Games like Monday Syndrome include Hades, The Binding of Isaac: Rebirth, Moonlighter, The Binding of Isaac, and Dead Cells. We matched them by the tags players give Monday Syndrome on Steam (Hack and Slash, Replay Value, Action Roguelike, Fast-Paced, and Dungeon Crawler): closest matches first, and among equally close ones the better-known games.

Hades
Shared: Hack and Slash · Action Roguelike · Action

The Binding of Isaac: Rebirth
Shared: Action Roguelike · Replay Value · Dungeon Crawler

Moonlighter
Shared: Hack and Slash · Dungeon Crawler · Action Roguelike

The Binding of Isaac
Shared: Action Roguelike · Replay Value · Procedural Generation

Dead Cells
Shared: Action Roguelike · Hack and Slash · Replay Value

Cinderia
Shared: Hack and Slash · Action Roguelike · Replay Value

UnderMine
Shared: Action Roguelike · Dungeon Crawler · Pixel Graphics

Heroes of Hammerwatch II
Shared: Action Roguelike · Dungeon Crawler · Hack and Slash

Hero Siege
Shared: Hack and Slash · Action Roguelike · Pixel Graphics

BlazBlue Entropy Effect
Shared: Action Roguelike · Replay Value · Action

Hades II
Shared: Hack and Slash · Action Roguelike · Action

Wolcen: Lords of Mayhem
Shared: Hack and Slash · Action · Dungeon Crawler

Death Must Die
Shared: Action Roguelike · Hack and Slash · Pixel Graphics

Children of Morta
Shared: Hack and Slash · Action Roguelike · Pixel Graphics

Wizard of Legend
Shared: Action Roguelike · Dungeon Crawler · Pixel Graphics

Mortal Sin
Shared: Action Roguelike · Hack and Slash · Dungeon Crawler

Last Epoch
Shared: Hack and Slash · Dungeon Crawler · Action

Dungeon Souls
Shared: Action Roguelike · Dungeon Crawler · Hack and Slash

Shape of Dreams
Shared: Action Roguelike · Hack and Slash · Dungeon Crawler

Heroes of Hammerwatch
Shared: Action Roguelike · Dungeon Crawler · Pixel Graphics

Noita
Shared: Dungeon Crawler · Action Roguelike · Pixel Graphics

Ember Knights
Shared: Action Roguelike · Hack and Slash · Dungeon Crawler

Tiny Rogues
Shared: Action Roguelike · Replay Value · Dungeon Crawler

Vampire Survivors
Shared: Action Roguelike · Pixel Graphics · Indie