Games like Word Turtle Island
Games like Word Turtle Island include Nova Drift, Vampire Survivors, Bit Blaster XL, Planes, Bullets and Vodka, and Deep Rock Galactic: Survivor. We matched them by the tags players give Word Turtle Island on Steam (Arena Shooter, Bullet Hell, Beat 'em up, PvE, and Shooter): closest matches first, and among equally close ones the better-known games.

Nova Drift
Shared: Bullet Hell · Arena Shooter · Arcade

Vampire Survivors
Shared: Bullet Hell · 2D · Arcade

Bit Blaster XL
Shared: Bullet Hell · Shooter · Arcade

Planes, Bullets and Vodka
Shared: Bullet Hell · Arcade · Shooter

Deep Rock Galactic: Survivor
Shared: Bullet Hell · Arena Shooter · PvE

Commando Collection
Shared: Beat 'em up · Bullet Hell · Shooter

Glyphica: Typing Survival
Shared: Arena Shooter · Bullet Hell · PvE

MADNESS: Project Nexus
Shared: Beat 'em up · Arena Shooter · Shooter

Chippy
Shared: Bullet Hell · Arena Shooter · Arcade

BALL x PIT
Shared: Bullet Hell · Arcade · Action

Streets of Rage 4
Shared: Beat 'em up · 2D · Arcade

LUFTRAUSERS
Shared: Bullet Hell · Arcade · 2D

SNKRX
Shared: Arena Shooter · Arcade · Shooter

Rogue: Genesia
Shared: Bullet Hell · Arcade · PvE

Sky Force Reloaded
Shared: Bullet Hell · Arcade · Top-Down

Exit the Gungeon
Shared: Bullet Hell · Arcade · 2D

Minishoot' Adventures
Shared: Bullet Hell · Top-Down · Cute

Time Wasters
Shared: Bullet Hell · Arena Shooter · 2D

Teenage Mutant Ninja Turtles: Shredder's Revenge
Shared: Beat 'em up · 2D · Arcade

Geometry Wars: Retro Evolved
Shared: Bullet Hell · Arcade · 2D

Rabbit and Steel
Shared: Bullet Hell · Cute · 2D

Rocket Rats
Shared: Bullet Hell · 2D · Shooter

Revolution Ace
Shared: Bullet Hell · Shooter · Arcade

Brotato
Shared: Bullet Hell · Arena Shooter · Arcade