Alien Storm screenshot

Release year: 1991

Alien Storm

Category: ArcadeBeat 'em UpRun-and-Gun

Alien Storm is a SEGA action game that first appeared in arcades in 1990 and was later released on the SEGA Genesis/Mega Drive in 1991. On this page you can play the Genesis version of Alien Storm online and revisit one of SEGA's more unusual arcade-style action games from the early 16-bit era.

The premise is simple but memorable. Earth is dealing with a strange alien invasion, and a small team known as the Alien Busters is sent in to deal with it. You can choose between three characters - Garth, Karen, or Scooter the robot - each with their own weapon and special attack.

Most of the game plays like a classic side-scrolling beat 'em up. You move through city streets clearing out aliens that appear from the most unexpected places. Trash cans, street signs, and other everyday objects can suddenly reveal an enemy hiding inside, so almost anything in the environment might turn out to be dangerous.

What makes Alien Storm a little different from many other brawlers of the time is how often the gameplay shifts. Between the street fights the game occasionally switches to short shooting sequences where aliens pop out of buildings and windows. These moments break up the pace and give the game a distinct arcade feel.

Start
Start / Pause in game
Joystick
Movement
A
Special
B
Attack
C
Roll
Save / Restart / Load

Animated Screenshots

Alien Storm title screen on SEGA Genesis/Mega Drive
Alien Storm level 1 gameplay on SEGA Genesis/Mega Drive
Crosshair shooting stage in Alien Storm on SEGA Genesis/Mega Drive
Alien Storm run and gun gameplay on SEGA Genesis/Mega Drive

🎮 Gameplay and level types

At first glance, Alien Storm looks like a classic side-scrolling beat 'em up. You move through city streets, defeat waves of enemies, and continue to the next area once the screen is clear. But the game doesn't stick to that formula for long. SEGA built the levels around several different gameplay styles, which keeps the pace changing from one mission to the next.

The most common sections play out like a traditional brawler. Your character walks through the streets fighting aliens at close range with their main weapon. One small twist is that enemies often hide inside ordinary objects. Trash cans, street signs, and other pieces of scenery can suddenly open up and reveal an alien waiting to attack. It makes every part of the environment feel suspicious, especially when you're moving through a crowded level.

From time to time the game switches to a crosshair shooting stage. Instead of controlling your character directly, you move a targeting reticle across the screen and shoot aliens as they pop out of buildings and windows. These segments are short but fast-paced, and they break up the rhythm of the street fights.

The third type of mission feels closer to a shooter. Your character runs forward automatically while you focus on firing at enemies in front of you. These run-and-gun sections move quickly and usually appear between the main combat stages.

Because the game rotates between these different level types, Alien Storm rarely feels repetitive. Just as you settle into one style of play, the next mission shifts perspective and asks you to react in a different way.


👥 Playable characters

At the start of Alien Storm, you choose one of three members of the Alien Busters team. Each character uses a different weapon, which slightly changes the feel of combat.

  • 🔫 Garth uses a blaster that fires energy shots straight ahead. His weapon has good range and allows him to deal with enemies before they get too close.
  • 🔥 Karen carries a flamethrower. The stream of fire spreads in front of her and can hit several aliens at once, which makes her effective when enemies crowd around the player.
  • ⚡ Scooter is a combat robot equipped with an electric whip. His attacks strike quickly and can reach enemies a short distance away, giving him a more close-range fighting style.

All three characters also have a powerful special attack that uses part of the energy meter. When activated, it clears most enemies on the screen and can help when the fight starts getting out of control.


🗝 Cheats and secrets

The Genesis/Mega Drive version of Alien Storm includes a hidden option that lets you change the number of starting credits. This can be useful if you want a few extra continues while learning the game or playing through it with a friend.

Credits setting in Alien Storm options menu on SEGA Genesis/Mega Drive

Change starting number of credits

Enter Options from the main menu and input the following sequence:

SpaceKKKSpace

Press Enter to return to the main menu. Then open Sound Test, and press Enter again to go back.

Enter Options once more. A new setting called Credits will now appear, allowing you to adjust the number of starting credits.


🕹 Playing Alien Storm today

Alien Storm is still easy to pick up. The controls are simple, the action starts quickly, and the levels move at a steady pace. One moment you're clearing aliens in a street fight, the next you're aiming at creatures jumping out of windows or blasting through a fast shooting section.

You can play Alien Storm online directly on this page using the SEGA Genesis version of the game. Just start the game, choose one of the Alien Busters, and the mission begins almost immediately.

It's the same straightforward arcade-style action the game was known for - quick stages, strange enemies hiding in everyday objects, and just enough chaos to keep each level interesting.