![Alien Invaders [preliminary sound]](/uploads/games/g-34904feaf4b7.png)
Alien Invaders [preliminary sound]
Inside Alien Invaders [preliminary sound]
Alien Invaders [preliminary sound] is an arcade prototype that appears to be a direct homage or clone of the classic fixed-screen shooters from the late 70s and early 80s. The title itself includes the note 'preliminary sound' which hints that this may be an early build or a fan-made revision, possibly tinkering with audio hardware. I have not been able to confirm a developer or publisher, and the ROM likely comes from a MAME set built from an undumped PCB or a hacked original. It belongs to a crowded era where every arcade cabinet tried to mimic the success of Taito's Space Invaders, though here the name is suspiciously generic.
The core gameplay follows the established routine: you control a laser cannon at the bottom of the screen and must blast rows of descending alien invaders. The aliens shuffle side to side, dropping down one row each time they reach an edge, and occasionally fire at you. Your cannon can slide left and right and shoot upward. The only thing that truly sets this build apart is the 'preliminary sound' tag, meaning the sound effects may be incomplete, repetitive, or missing altogether. Without a PCB to inspect, I cannot say if any new enemies, power-ups, or scoring systems were added.
As a curiosity, Alien Invaders [preliminary sound] is worth trying if you enjoy digging through prototype ROMs or want to hear what early arcade audio engineering sounded like before full mixing was implemented. It does not offer any major innovation over the countless Space Invaders clones - it is a simple, stripped‑down version of a proven formula. For the casual retro gamer, you might get a minute of nostalgic fun, but it is unlikely to hold your attention for long. It remains a footnote in the arcade catalog, best appreciated by preservationists and collectors.
How to Play Alien Invaders [preliminary sound] Online
Getting Started
When you first launch Alien Invaders [preliminary sound], you will probably see a title screen that just says the name in a basic font. Press Enter (Start) to begin. There are no menus, difficulty selections, or high score entry; the game dumps you right into the action. Your laser cannon starts at the bottom center; use the Arrow Keys to move left and right, and press X (the A button) to fire. Each wave of aliens descends from the top, and you must eliminate every one before they reach the bottom or stack onto your cannon.
The core loop is simple: shoot aliens, dodge their bombs, and survive until a new wave appears. There is no shield, no bonus stage, and no level select. The 'preliminary sound' tag means the audio may be rough or missing sound effects entirely, so do not expect polished beeps and booms. Just focus on staying alive and racking up points. If you die, the game resets to the first wave - no continues, no extra lives beyond what you started with. It is a pure, no‑frills shooting experience from the earliest days of arcade gaming.
Because this is a prototype or a hack, you might encounter minor graphical glitches or unpredictable behavior. Save states (use Z to save, X to load in most MAME frontends) can help you preserve progress, but the game is so short that you probably will not need them. Just jump in, enjoy the raw retro feel, and see how far you get before the aliens overwhelm you. If the game fails to boot or displays garbled graphics, try a different MAME emulator version; this ROM came from a somewhat obscure source.
Alien Invaders [preliminary sound] Keyboard Controls
Controls
- Arrow Keys: Joystick / Movement
- X: Button 1
- S: Button 2
- Z: Button 3
- A: Button 4
- Q: Button 5
- E: Button 6
- Enter: Start / 1P
- V: Coin / Insert
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