Games similar to Slime Rancher include Cave Story (Dokutsu Monogatari), which is free. Other options are Hollow Knight, Super Meat Boy, Frogatto & Friends and Ori. Platform Games like Slime Rancher are a crowded field, with more than 50 alternatives for Windows, Mac, Linux, Android and iPhone.
I Wanna Be The Guy: The Movie: The Game is a sardonic loveletter to the halcyon days of early American videogaming, packaged as a nail-rippingly difficult platform adventure. Players fill the role of The Kid, a youthful, vaguely Megaman-esque protagonist on a quest to become The...
Japan
Super Mario: Blue Twilight DX is a non-profit unofficial fangame based on the Mario universe. It combines elements from 3D Mario titles with classic, 2D gameplay, set in Halloween-themed levels.
Capsized is a retro-inspired 2d platformer developed by Alientrap. Presented in a unique hand drawn art style. As a intrepid space traveler, you have crash landed on a mysterious planet and soon discover you are not alone.
Canada
Robin just wants to be a mechanic and help people, but without a license she’s a sinner in Mother’s eyes.
Sweden
EU
Sword Of Dimensions is a platform game with elements of environmental puzzle. You control lone traveler who accidentally finds a way to strange world with no sunlight. Grab your sword and prepare for long journey.
Sealed Bite is a Metroidvania style platformer where you’re running against the clock to find crystal shards that prevent you from turning into a werewolf.
Alex the Allegator is a series of games that I, Johan Peitz, usually use for game coding challenges like Speedhack and Ludumdare.
SwedenEU
SpainEU
Megaman Unlimited is a Megaman fan-game in the classic 8-Bit NES style both in sound and visuals. It is similar to Megaman 3 and Megaman 9-10 in design philosophy. MMU is made by fans for fun. It is not related to the official series’ canon.
Canada
"Of Light & Shadow" is an award winning sidescroll puzzle-platformer for PC/Mac with a slight twist; the game combines two areas in each level, light and shadow, as well as two protagonists in one playable character, Mr. Light and Dr. Shadow.
Metroid is a game franchise created by Nintendo. The player suits up as intergalactic bounty hunter Samus Aran and battle your way out from the depths of a mysterious alien world plagued by a mechanical menace.
Japan
Eternal Daughter is a freeware action-adventure game. The protagonist, Mia, is daughter of the Lorian priestess and an unknown father. Like the rest of her people, she is enslaved to do menial labor, under the supervision of her half-brother Hume.
United States
