Games like Rain Island
Games like Rain Island include Pikuniku, Gensokyo Night Festival, Zup! S, Haunt the House: Terrortown, and Timberman. We matched them by the tags players give Rain Island on Steam (Action, Indie, Casual, Cute, and 2D): closest matches first, and among equally close ones the better-known games.

Pikuniku
Shared: Indie · Casual · Cute

Gensokyo Night Festival
Shared: Action · Indie · Casual

Zup! S
Shared: Indie · Casual · 2D

Haunt the House: Terrortown
Shared: Indie · Cute · Action

Timberman
Shared: Casual · Indie · Action

Muse Dash
Shared: Cute · Casual · 2D

Skul: The Hero Slayer
Shared: Action · Indie · 2D

DJMAX RESPECT V
Shared: Casual · Action · Cute

Vampire Survivors
Shared: Indie · 2D · Casual

Montaro
Shared: Cute · Casual · Indie

Cat Goes Fishing
Shared: Indie · Cute · 2D

Zup! 2
Shared: Indie · Casual · 2D

One Finger Death Punch 2
Shared: Action · Indie · Casual

Zup!
Shared: Indie · Casual · 2D

Cat Quest
Shared: Action · Cute · Indie

Broforce
Shared: Action · 2D · Indie

The Cat Games
Shared: Casual · Indie · Cute

One Finger Death Punch
Shared: Action · Indie · 2D

Zup! 4
Shared: Indie · Casual · 2D

Zup! 3
Shared: Indie · Casual · 2D

ShellShock Live
Shared: Action · 2D · Casual

Cyberhunt
Shared: Action · Indie · Casual

Return.
Shared: Indie · Action · Casual

Toki Tori
Shared: Indie · Casual · Cute