Games like Alec Adventure
Games like Alec Adventure include SANABI, Celeste, Pizza Tower, Shovel Knight: Treasure Trove, and Thank Goodness You're Here!. We matched them by the tags players give Alec Adventure on Steam (Adventure, 2D Platformer, Platformer, Side Scroller, and Casual): closest matches first, and among equally close ones the better-known games.

SANABI
Shared: 2D Platformer · Adventure · Pixel Graphics

Celeste
Shared: Platformer · 2D Platformer · Pixel Graphics

Pizza Tower
Shared: 2D Platformer · Platformer · Pixel Graphics

Shovel Knight: Treasure Trove
Shared: Platformer · Adventure · Pixel Graphics

Thank Goodness You're Here!
Shared: Adventure · 2D Platformer · Casual

Skul: The Hero Slayer
Shared: Pixel Graphics · Platformer · 2D

Sonic Superstars
Shared: 2D Platformer · Platformer · Adventure

DAVE THE DIVER
Shared: Adventure · Casual · Pixel Graphics

Sonic Origins
Shared: 2D Platformer · Adventure · Platformer

Chained Together
Shared: Adventure · Platformer · Casual

Broforce
Shared: Platformer · Pixel Graphics · 2D

Super Meat Boy
Shared: Platformer · 2D Platformer · Pixel Graphics

The Messenger
Shared: Platformer · Pixel Graphics · 2D Platformer

Sonic Mania
Shared: Platformer · Adventure · 2D

Himno
Shared: Platformer · Adventure · Pixel Graphics

Smilemo
Shared: Adventure · Platformer · 2D Platformer

Anomaly Agent
Shared: 2D Platformer · Side Scroller · Platformer

Owlboy
Shared: Adventure · Platformer · Pixel Graphics

Blasphemous 2
Shared: Adventure · 2D Platformer · Side Scroller

Katana ZERO
Shared: Platformer · Pixel Graphics · 2D Platformer

Super Bernie World
Shared: Adventure · 2D Platformer · Platformer

Dungeon Munchies
Shared: Adventure · Pixel Graphics · Indie

Dead Cells
Shared: Adventure · Pixel Graphics · Platformer

Super Fancy Pants Adventure
Shared: Adventure · Platformer · Casual