Games like Jamestown
Games like Jamestown include Cuphead, ZeroRanger, Vampire Survivors, LUFTRAUSERS, and Ikaruga. We matched them by the tags players give Jamestown on Steam (Shoot 'Em Up, Bullet Hell, Local Co-Op, Indie, and Arcade): closest matches first, and among equally close ones the better-known games.
Cuphead
Shared: Local Co-Op · Indie · Difficult
ZeroRanger
Shared: Shoot 'Em Up · Bullet Hell · Indie
Vampire Survivors
Shared: Bullet Hell · Indie · 2D
LUFTRAUSERS
Shared: Bullet Hell · Indie · Arcade
Ikaruga
Shared: Shoot 'Em Up · Bullet Hell · Arcade
Broforce
Shared: Local Co-Op · Action · Indie
Enter the Gungeon
Shared: Bullet Hell · Indie · Local Co-Op
Just Shapes & Beats
Shared: Bullet Hell · Indie · Action
Revolution Ace
Shared: Shoot 'Em Up · Bullet Hell · Indie
Sky Force Reloaded
Shared: Shoot 'Em Up · Bullet Hell · Arcade
Bit Blaster XL
Shared: Shoot 'Em Up · Bullet Hell · Arcade
Star Saviors
Shared: Shoot 'Em Up · Bullet Hell · Indie
Streets of Rage 4
Shared: Indie · Action · Arcade
PARTICLE MACE
Shared: Indie · Arcade · Action
Geometry Wars™ 3: Dimensions Evolved
Shared: Shoot 'Em Up · Bullet Hell · Arcade
BALL x PIT
Shared: Bullet Hell · Arcade · Shoot 'Em Up
DARIUSBURST Chronicle Saviours
Shared: Shoot 'Em Up · Arcade · Bullet Hell
Exit the Gungeon
Shared: Indie · Arcade · Bullet Hell
TowerFall Ascension
Shared: Indie · Local Co-Op · Local Multiplayer
Touhou Tenkuushou ~ Hidden Star in Four Seasons.
Shared: Bullet Hell · Shoot 'Em Up · Indie
Nuclear Throne
Shared: Indie · Bullet Hell · Action
The Bug Butcher
Shared: Shoot 'Em Up · Indie · Local Co-Op
Nex Machina
Shared: Bullet Hell · Shoot 'Em Up · Arcade
METAL SLUG
Shared: Arcade · Shoot 'Em Up · Action