Games like Summer Sale
Games like Summer Sale include Russian Life Simulator, Mountain, Chinese Parents, Game Dev Tycoon, and Cookie Clicker. We matched them by the tags players give Summer Sale on Steam (Memes, Simulation, Singleplayer, Indie, and Casual): closest matches first, and among equally close ones the better-known games.

Russian Life Simulator
Shared: Memes · Simulation · Singleplayer

Mountain
Shared: Simulation · Indie · Singleplayer

Chinese Parents
Shared: Memes · Simulation · Casual

Game Dev Tycoon
Shared: Simulation · Indie · Singleplayer

Cookie Clicker
Shared: Incremental · Indie · Casual

Papers, Please
Shared: Simulation · Indie · Singleplayer

Passpartout: The Starving Artist
Shared: Simulation · Casual · Singleplayer

There's Poop In My Soup
Shared: Memes · Indie · Casual

My Name is Mayo
Shared: Memes · Casual · Incremental

Plague Inc: Evolved
Shared: Simulation · Indie · Singleplayer

Goat Simulator
Shared: Simulation · Casual · Indie

Peace, Death!
Shared: Indie · Simulation · Memes

Youtubers Life
Shared: Singleplayer · Simulation · Casual

FEMINAZI: The Triggering
Shared: Memes · Indie · Simulation

Emily is Away Too
Shared: Simulation · Indie · Casual

Leaf it Alone
Shared: Simulation · Casual · Singleplayer

Montaro
Shared: Memes · Indie · Casual

Mini Motorways
Shared: Simulation · Casual · Indie

House Flipper
Shared: Simulation · Singleplayer · Casual

SPACEPLAN
Shared: Indie · Casual · Incremental

Equilinox
Shared: Simulation · Indie · Casual

911 Operator
Shared: Simulation · Singleplayer · Indie

Click the Button
Shared: Indie · Casual · Simulation

Potion Craft: Alchemist Simulator
Shared: Singleplayer · Simulation · Indie