Games like Duke of Alpha Centauri
Games like Duke of Alpha Centauri include Bit Blaster XL, Planes, Bullets and Vodka, Cyberhunt, Beat Hazard, and Star Saviors. We matched them by the tags players give Duke of Alpha Centauri on Steam (Action, Casual, Indie, Shoot 'Em Up, and Space): closest matches first, and among equally close ones the better-known games.

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

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

Cyberhunt
Shared: Action · Indie · Casual

Beat Hazard
Shared: Shoot 'Em Up · Bullet Hell · Action

Star Saviors
Shared: Action · Shoot 'Em Up · Indie

Starblast
Shared: Action · Indie · Casual

Chicken Invaders 5
Shared: Action · Casual · Indie

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

RADical ROACH Remastered
Shared: Action · Indie · Casual

LUFTRAUSERS
Shared: Indie · Action · Bullet Hell

Vampire Survivors
Shared: Bullet Hell · Indie · Casual

TouHou Makuka Sai ~ Fantastic Danmaku Festival
Shared: Action · Indie · Casual

ZeroRanger
Shared: Indie · Shoot 'Em Up · Action

Chicken Invaders 4
Shared: Casual · Action · Indie

Revolution Ace
Shared: Action · Shoot 'Em Up · Indie

Symphony
Shared: Indie · Action · Shoot 'Em Up

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

Distant Space
Shared: Indie · Shoot 'Em Up · Casual

TouHou Makuka Sai ~ Fantastic Danmaku Festival Part II
Shared: Indie · Shoot 'Em Up · Bullet Hell

Asteroid Bounty Hunter
Shared: Action · Indie · Casual

Dead Bits
Shared: Action · Indie · Casual

State of Anarchy
Shared: Action · Indie · Casual

Polygon Attack
Shared: Casual · Action · Indie

Touhou Kouryudou ~ Unconnected Marketeers.
Shared: Action · Shoot 'Em Up · Bullet Hell