Games like Zaxtron EXPLUS
Games like Zaxtron EXPLUS include Battlefield™ 6, Battlefield™ 2042, Planes, Bullets and Vodka, Bit Blaster XL, and Touhou Koumakyou: New Classic - the Embodiment of Scarlet Devil. We matched them by the tags players give Zaxtron EXPLUS on Steam (Action, Shooter, Bullet Hell, 2D, and 1980s): closest matches first, and among equally close ones the better-known games.

Battlefield™ 6
Shared: Shooter · Action · Singleplayer

Battlefield™ 2042
Shared: Shooter · Action · Singleplayer

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

Bit Blaster XL
Shared: Bullet Hell · Shooter · Action

Touhou Koumakyou: New Classic - the Embodiment of Scarlet Devil
Shared: Bullet Hell · Action · Shoot 'Em Up

STAR WARS™ Battlefront™ II
Shared: Shooter · Action · Singleplayer

BALL x PIT
Shared: Action · Bullet Hell · Shoot 'Em Up

LUFTRAUSERS
Shared: Bullet Hell · Action · 2D

Commando Collection
Shared: Action · Shooter · Bullet Hell

Vampire Survivors
Shared: Bullet Hell · 2D · Singleplayer

Touhou Juuouen 〜 Unfinished Dream of All Living Ghost.
Shared: Action · Bullet Hell · Shooter

DRAINUS
Shared: Action · Shooter · 2D

Titanfall® 2
Shared: Shooter · Action · Singleplayer

BioShock Infinite
Shared: Action · Shooter · Singleplayer

Touhou Kouryudou ~ Unconnected Marketeers.
Shared: Action · Bullet Hell · Shooter

Call of Duty®
Shared: Shooter · Action · Singleplayer

Strike Force Heroes
Shared: Action · Shooter · 2D

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

Grand Theft Auto V Legacy
Shared: Action · Shooter · Singleplayer

Revolution Ace
Shared: Action · Bullet Hell · Shooter

Call of Duty®: Modern Warfare® III
Shared: Action · Shooter · Singleplayer

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

Touhou Kinjoukyou ~ Fossilized Wonders.
Shared: Bullet Hell · Shooter · Action

Counter-Strike 2
Shared: Shooter · Action