Games like Desktop Halfpipe
Games like Desktop Halfpipe include Cookie Clicker, Session: Skate Sim, Plantera, Luna's Fishing Garden, and Momodora: Reverie Under The Moonlight. We matched them by the tags players give Desktop Halfpipe on Steam (Side Scroller, Exploration, 2D Platformer, Immersive Sim, and Idler): closest matches first, and among equally close ones the better-known games.

Cookie Clicker
Shared: Idler · Incremental · Collectathon

Session: Skate Sim
Shared: Sports · Exploration · Skateboarding

Plantera
Shared: Idler · Incremental · Collectathon

Luna's Fishing Garden
Shared: 2D Platformer · Idler · Collectathon

Momodora: Reverie Under The Moonlight
Shared: Side Scroller · 2D Platformer · Exploration

Ultimate Fishing Simulator
Shared: Immersive Sim · Exploration · Sports

skate.
Shared: Skateboarding · Sports · Sandbox

Click the Button
Shared: Idler · Incremental · Casual

Digseum
Shared: Incremental · Idler · Casual

IGTAP: an Incremental Game That's Also a Platformer
Shared: 2D Platformer · Incremental · Idler

Chillquarium
Shared: Idler · Collectathon · Incremental

Prince of Persia The Lost Crown
Shared: Exploration · 2D Platformer · Side Scroller

Shelldiver
Shared: Incremental · Idler · Casual

Steep™
Shared: Exploration · Sports · Simulation

Afterimage
Shared: 2D Platformer · Side Scroller · Exploration

Stone Simulator – Just Be a Rock
Shared: Exploration · Immersive Sim · Idler

Keep on Mining!
Shared: Idler · Incremental · Casual

Internet Cafe Simulator 2
Shared: Exploration · Immersive Sim · Sandbox

Slime Rancher
Shared: Exploration · Sandbox · Simulation

Kiwi Clicker - Juiced Up
Shared: Incremental · Idler · Collectathon

All Hail the Orb
Shared: Exploration · Incremental · Idler

Stormworks: Build and Rescue
Shared: Immersive Sim · Sandbox · Exploration

Thank Goodness You're Here!
Shared: Exploration · 2D Platformer · Side Scroller

Nodebuster
Shared: Incremental · Idler · Casual