Games like Simona's Requiem
Games like Simona's Requiem include Hollow Knight, Ori and the Will of the Wisps, SANABI, Hollow Knight: Silksong, and ANIMAL WELL. We matched them by the tags players give Simona's Requiem on Steam (Exploration, 2D Platformer, Action-Adventure, Platformer, and 2D): closest matches first, and among equally close ones the better-known games.

Hollow Knight
Shared: Platformer · Metroidvania · Exploration

Ori and the Will of the Wisps
Shared: Platformer · Metroidvania · Exploration

SANABI
Shared: 2D Platformer · Action · Story Rich

Hollow Knight: Silksong
Shared: Metroidvania · Exploration · 2D

ANIMAL WELL
Shared: Exploration · Metroidvania · Platformer

F.I.S.T.: Forged In Shadow Torch
Shared: Platformer · Metroidvania · 2D Platformer

Rain World
Shared: Exploration · Platformer · 2D

Webbed
Shared: 2D Platformer · Exploration · 2D

MIO: Memories in Orbit
Shared: Exploration · Platformer · Metroidvania

Pipistrello and the Cursed Yoyo
Shared: Exploration · Action-Adventure · 2D Platformer

Momodora: Reverie Under The Moonlight
Shared: 2D Platformer · Exploration · Metroidvania

Constance
Shared: Platformer · Metroidvania · Action-Adventure

Owlboy
Shared: Platformer · 2D · Metroidvania

Katana ZERO
Shared: Platformer · 2D Platformer · Action

Castlevania: Belmont's Curse
Shared: 2D Platformer · Metroidvania · Platformer

The Messenger
Shared: Platformer · Metroidvania · 2D

Prince of Persia The Lost Crown
Shared: Exploration · 2D Platformer · Metroidvania

Celeste
Shared: 2D Platformer · Platformer · Pixel Graphics

Castlevania Advance Collection
Shared: 2D Platformer · Exploration · Metroidvania

Nine Sols
Shared: Metroidvania · Platformer · 2D

Haiku, the Robot
Shared: Exploration · Metroidvania · Platformer

STAR WARS Jedi: Fallen Order™
Shared: Action-Adventure · Exploration · Platformer

Dust: An Elysian Tail
Shared: Platformer · Metroidvania · Action

Axiom Verge
Shared: Metroidvania · Platformer · 2D