Games like Doctor Nanobot
Games like Doctor Nanobot include Vampire Survivors, BALL x PIT, LUFTRAUSERS, Cyberhunt, and Planes, Bullets and Vodka. We matched them by the tags players give Doctor Nanobot on Steam (Action, Arcade, Bullet Hell, Shoot 'Em Up, and Twin Stick Shooter): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Bullet Hell · 2D · Pixel Graphics

BALL x PIT
Shared: Action · Arcade · Bullet Hell

LUFTRAUSERS
Shared: Arcade · Bullet Hell · Action

Cyberhunt
Shared: Action · Shoot 'Em Up · Arcade

Planes, Bullets and Vodka
Shared: Action · Shoot 'Em Up · Bullet Hell

UBERMOSH
Shared: Action · Arcade · Pixel Graphics

ZeroRanger
Shared: Shoot 'Em Up · Bullet Hell · Action

Nova Drift
Shared: Bullet Hell · Shoot 'Em Up · Arcade

Bit Blaster XL
Shared: Bullet Hell · Shoot 'Em Up · Arcade

UBERMOSH:WRAITH
Shared: Action · Arcade · Bullet Hell

Beat Hazard
Shared: Bullet Hell · Twin Stick Shooter · Shoot 'Em Up

Waves
Shared: Bullet Hell · Shoot 'Em Up · Arcade

UBERMOSH Vol.3
Shared: Action · Arcade · Bullet Hell

Exit the Gungeon
Shared: Arcade · Action · Bullet Hell

Nex Machina
Shared: Action · Bullet Hell · Arcade

Dimension Tripper Neptune: TOP NEP
Shared: Action · Arcade · Bullet Hell

Ultratron
Shared: Action · Arcade · Twin Stick Shooter

Huntdown
Shared: Action · Pixel Graphics · Shoot 'Em Up

Super Bit Blaster XL
Shared: Bullet Hell · Arcade · Shoot 'Em Up

Star Saviors
Shared: Action · Bullet Hell · Shoot 'Em Up

Geometry Wars: Retro Evolved
Shared: Arcade · Twin Stick Shooter · Bullet Hell

Windowkill
Shared: Action · Bullet Hell · Arcade

METAL SLUG
Shared: Action · Arcade · 2D

Ikaruga
Shared: Arcade · Bullet Hell · Shoot 'Em Up