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Alien Syndrome (USA) (Unl) cover art
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๐Ÿ•น๏ธ GAME CONTROLS

Action / ButtonKeyboard Key
D-Pad (Up / Down / Left / Right)Arrow Keys
Button AZ or J
Button BX or K
Button X / Turbo AA or U
Button Y / Turbo BS or I
SelectShift
StartEnter

๐Ÿ’ก Tip: You can also connect any USB / Bluetooth Gamepad controller!

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๐ŸŽฎ VISUAL CONTROLLER MAPPING & GAMEPAD DIAGRAM Auto-Detect: Active
L1 / LB R1 / RB SELECT START Y X A B RETRO ARCADE
Gamepad InputRetro FunctionKeyboard Key
D-Pad / AnalogCharacter Movement / Steeringโ–ฒ โ–ผ โ—„ โ–บ
Button A (East)Primary Action / Attack / FireZ / K
Button B (South)Secondary / Jump / CancelX / J
Button X / YSpecial / Turbo / Extra FireA / S
SelectInsert Coin / Select OptionRight Shift
StartGame Start / Pause GameEnter
Game info: ๐Ÿ‘๏ธ 88 plays
Alien Syndrome (USA) (Unl)
box cover
Game title:Alien Syndrome (USA) (Unl)
Platform:NES
Author (released): Unknown (1989)
Emulator Core:NES
Game Manual: ๐Ÿ“– Official Manual (Built-in)
Share Game:
License:Freeware / Abandonware
Available online emulators for Alien Syndrome (USA) (Unl):

Different online emulators are available for Alien Syndrome (USA) (Unl). Select an emulator core below for optimal performance:

Emulator Core EngineTechnologyMultiplayerGamepadTouchAdsAction / Switch
EmulatorJS (Default WebAssembly) WebAssembly / JSYESYES YESNO โ–ถ ACTIVE
NES / Famicom (Recommended) WebAssembly / LibretroYESYES YESNO PLAY โšก
Nestopia UE (Accurate) WebAssembly / LibretroYESYES YESNO PLAY โšก
Game description:

Originally an arcade hit by Sega, Alien Syndrome was brought to the NES in 1989 by Tengen as an unlicensed release. This top-down run-and-gun shooter drops players into infested spaceships to fight off grotesque alien hordes and save captured crew members.

How to Play

Your objective is to rescue a set number of hostages within a strict time limit before the ship self-destructs. Rescuing enough hostages unlocks the exit, leading to a battle against a screen-filling boss. The game uses standard NES controls: the D-pad to move, A and B to fire your weapon, and Start/Select for pausing and menus. In your browser, these map to the Arrow Keys, Z/X, and Enter/Shift.

Tips

  • Search carefully for weapon upgrades like lasers and fireballs scattered throughout the ships, as the default blaster is weak against bosses.
  • Keep an eye on the ticking timerโ€”prioritize finding the hostages quickly rather than trying to defeat every single enemy.
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