Games like Flee the fallen
Games like Flee the fallen include SANABI, Blasphemous 2, Zombotron, Celeste, and Skul: The Hero Slayer. We matched them by the tags players give Flee the fallen on Steam (Side Scroller, Difficult, Zombies, Beat 'em up, and Shoot 'Em Up): closest matches first, and among equally close ones the better-known games.
SANABI
Shared: Action · Pixel Graphics · 2D Platformer
Blasphemous 2
Shared: Difficult · Side Scroller · Adventure
Zombotron
Shared: Action · Zombies · Adventure
Celeste
Shared: Difficult · Pixel Graphics · 2D Platformer
Skul: The Hero Slayer
Shared: Action · Pixel Graphics · Difficult
The Final Station
Shared: Zombies · Pixel Graphics · Action
Rain World
Shared: Difficult · Pixel Graphics · Adventure
Deadlight
Shared: Zombies · Action · Side Scroller
Teenage Mutant Ninja Turtles: Shredder's Revenge
Shared: Side Scroller · Beat 'em up · Pixel Graphics
Guns, Gore and Cannoli 2
Shared: Side Scroller · Action · Shoot 'Em Up
Momodora: Reverie Under The Moonlight
Shared: Side Scroller · 2D Platformer · Difficult
Super Meat Boy
Shared: Difficult · 2D Platformer · Pixel Graphics
Guns, Gore & Cannoli
Shared: Side Scroller · Action · Zombies
DEADBOLT
Shared: Difficult · Pixel Graphics · Action
Left 4 Dead 2
Shared: Zombies · Action · Shooter
Broforce
Shared: Action · Pixel Graphics · Side Scroller
Shovel Knight: Treasure Trove
Shared: Difficult · Pixel Graphics · Side Scroller
Huntdown
Shared: Side Scroller · Action · Shoot 'Em Up
NINJA GAIDEN: Ragebound
Shared: Side Scroller · Action · 2D Platformer
Katana ZERO
Shared: Action · Pixel Graphics · 2D Platformer
Kung Fury: Street Rage - Ultimate Edition
Shared: Beat 'em up · Side Scroller · Action
Shank 2
Shared: Beat 'em up · Action · Side Scroller
Days Gone
Shared: Zombies · Action · Action-Adventure
Blasphemous
Shared: Difficult · Pixel Graphics · Action