Games like Flappy Alien
Games like Flappy Alien include Vampire Survivors, Timberman, SANABI, DAVE THE DIVER, and Celeste. We matched them by the tags players give Flappy Alien on Steam (Casual, Singleplayer, Arcade, Pixel Graphics, and 2D Platformer): closest matches first, and among equally close ones the better-known games.
Vampire Survivors
Shared: Pixel Graphics · Singleplayer · Casual
Timberman
Shared: Casual · Pixel Graphics · Singleplayer
SANABI
Shared: Pixel Graphics · Singleplayer · 2D Platformer
DAVE THE DIVER
Shared: Casual · Pixel Graphics · Singleplayer
Celeste
Shared: Pixel Graphics · Singleplayer · 2D Platformer
Downwell
Shared: Pixel Graphics · Arcade · 2D Platformer
Deep Space Cache
Shared: Casual · Singleplayer · Indie
Cyberhunt
Shared: Casual · Arcade · Indie
To The Core
Shared: Casual · Arcade · Singleplayer
pureya
Shared: Casual · Arcade · Singleplayer
Baba Is You
Shared: Singleplayer · Pixel Graphics · Indie
Zup! S
Shared: Casual · Singleplayer · Indie
Rhythm Doctor
Shared: Pixel Graphics · Singleplayer · Indie
A Dance of Fire and Ice
Shared: Singleplayer · Arcade · Casual
Pizza Tower
Shared: 2D Platformer · Singleplayer · Pixel Graphics
Razortron 2000
Shared: Casual · Arcade · Singleplayer
Balatro
Shared: Singleplayer · Pixel Graphics · Casual
Peggle Deluxe
Shared: Casual · Arcade · Singleplayer
Exit the Gungeon
Shared: Arcade · Pixel Graphics · Singleplayer
VVVVVV
Shared: Pixel Graphics · 2D Platformer · Singleplayer
Bit Blaster XL
Shared: Arcade · Casual · Pixel Graphics
Super Meat Boy
Shared: 2D Platformer · Pixel Graphics · Singleplayer
Papers, Please
Shared: Singleplayer · Pixel Graphics · Indie
Waveform
Shared: Casual · Singleplayer · Arcade