Games like Up N' Down
Games like Up N' Down include Hot Lava, Pogostuck: Rage With Your Friends, SpeedRunners, SEUM: Speedrunners from Hell, and Ultimate Chicken Horse. We matched them by the tags players give Up N' Down on Steam (Precision Platformer, Difficult, Parkour, Racing, and Replay Value): closest matches first, and among equally close ones the better-known games.

Hot Lava
Shared: Precision Platformer · Parkour · Racing

Pogostuck: Rage With Your Friends
Shared: Difficult · Precision Platformer · Multiplayer

SpeedRunners
Shared: Racing · Multiplayer · Parkour

SEUM: Speedrunners from Hell
Shared: Precision Platformer · Parkour · Difficult

Ultimate Chicken Horse
Shared: Multiplayer · PvP · Precision Platformer

Only Climb: Better Together
Shared: Precision Platformer · Difficult · 3D Platformer

Rocket League®
Shared: Multiplayer · Racing · PvP

Dota 2
Shared: Multiplayer · Difficult · PvP

Gorilla Tag
Shared: Parkour · Multiplayer · Funny

Clustertruck
Shared: Parkour · Difficult · 3D Platformer

Celeste
Shared: Precision Platformer · Difficult · Platformer

Need for Speed™ Heat
Shared: Racing · Multiplayer · Combat Racing

Geometry Dash
Shared: Difficult · Precision Platformer · Platformer

Super Meat Boy
Shared: Precision Platformer · Difficult · Platformer

Ben and Ed
Shared: Parkour · Multiplayer · Difficult

Counter-Strike 2
Shared: Multiplayer · PvP · Action

FlatOut 2
Shared: Racing · Multiplayer · Combat Racing

Need for Speed™ Unbound
Shared: Racing · Multiplayer · Combat Racing

Human Fall Flat
Shared: Multiplayer · Funny · PvP

Cuphead
Shared: Difficult · Multiplayer · Platformer

Spelunky 2
Shared: Difficult · Replay Value · Platformer

Grand Theft Auto V Legacy
Shared: Multiplayer · Action · Racing

Get To Work
Shared: Difficult · Precision Platformer · Funny

Tom Clancy's Rainbow Six Siege
Shared: PvP · Multiplayer · Action