Games like FrogCore
Games like FrogCore include Celeste, Super Meat Boy, SANABI, Downwell, and VVVVVV. We matched them by the tags players give FrogCore on Steam (2D Platformer, Platformer, Precision Platformer, Adventure, and Arcade): closest matches first, and among equally close ones the better-known games.

Celeste
Shared: Precision Platformer · Platformer · 2D Platformer

Super Meat Boy
Shared: Platformer · Precision Platformer · 2D Platformer

SANABI
Shared: 2D Platformer · Adventure · Pixel Graphics

Downwell
Shared: Precision Platformer · Platformer · 2D Platformer

VVVVVV
Shared: Platformer · Precision Platformer · 2D Platformer

Rogue Legacy 2
Shared: Platformer · Arcade · Adventure

Hollow Knight
Shared: Platformer · 2D · Singleplayer

Shovel Knight: Treasure Trove
Shared: Platformer · Adventure · 2D

Geometry Dash
Shared: Precision Platformer · Platformer · 2D

Jump King
Shared: Precision Platformer · Platformer · Adventure

Pizza Tower
Shared: 2D Platformer · Platformer · Singleplayer

Prince of Persia The Lost Crown
Shared: 2D Platformer · Adventure · Precision Platformer

Katana ZERO
Shared: Platformer · 2D Platformer · Action

Rogue Legacy
Shared: Platformer · Singleplayer · 2D

Skul: The Hero Slayer
Shared: Platformer · Action · 2D

Sonic Origins
Shared: 2D Platformer · Adventure · Platformer

Gravity Circuit
Shared: Platformer · 2D Platformer · Action

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

The End Is Nigh
Shared: Platformer · Precision Platformer · Adventure

Momodora: Reverie Under The Moonlight
Shared: 2D Platformer · Pixel Graphics · 2D

Mark of the Ninja
Shared: Platformer · 2D · Singleplayer

Smilemo
Shared: Platformer · Adventure · 2D Platformer

Ori and the Will of the Wisps
Shared: Platformer · Singleplayer · Adventure

Exit the Gungeon
Shared: Arcade · Adventure · 2D Platformer