Alien Syndrome
Sega Game Gear · 1991
About this game
Alien Syndrome is a remake of SEGA's classic alien blaster for its 3D AGES label.
In the game, an alien threat has seized your spaceship and your mission consists of escaping the doomed vessel by clearing each section until you get to the escape pod in standard top-down sidescroller fashion.
↓ Read more
As you progress through the starship you'll find other survivors of the alien onslaught whom you must rescue in order to get vital items and aid.
You'll need all the help you can get, as a time bomb also threatens to destroy you if you don't leave fast enough.
Fortunately for this remake (which incorporates 3D graphics and newly arranged music) you also get full dual-analog controller support which allows for independent movement and firing directions, as well as 2-player co-op gameplay as added features and to animated cutscenes between levels.
About Sega Game Gear
Sega's Game Gear (1990) was a technically capable handheld competitor to the Game Boy, notable for its full-color backlit screen — a real advantage at the time, offset by famously poor battery life. Its commercial underperformance against Nintendo's handheld means smaller print runs overall, and complete, well-preserved cartridges (the plastic shells are prone to yellowing and cracking) are a genuine niche within retro handheld collecting.
Gamevaro tracks Alien Syndrome for Sega Game Gear with separate market values for loose, complete-in-box (CIB) and factory-sealed copies, sourced from real eBay sales. Prices also vary by region — PAL, NTSC-U and NTSC-J releases of the same game often sell for different amounts due to print run sizes and regional collector demand.
Adding Alien Syndrome to a Gamevaro collection takes seconds — search by title or scan the box barcode, and the app fills in cover art, release details and current pricing automatically. This GG release dates back to 1991.
Price history
Market values by condition
PAL
NTSC-J
Recent sales
| Date | Type | Region | Price |
|---|---|---|---|
| 2026-07-15 | Item only | PAL | €63.56 |
| 2026-07-15 | Item only | NTSC-J | €52.60 |
| 2026-07-12 | Item only | NTSC-J | €34.99 |
| 2026-07-12 | Manual Only | NTSC-J | €8.80 |
| 2026-07-12 | Manual Only | PAL | €10.11 |
| 2026-07-12 | Box Only | NTSC-J | €14.08 |
| 2026-07-12 | Item only | PAL | €28.31 |
| 2026-07-12 | New (sealed) | NTSC-J | €90.57 |
| 2026-07-12 | Complete in Box | PAL | €73.46 |
| 2026-07-12 | Graded New | PAL | €61.14 |
| 2026-07-12 | Box Only | PAL | €29.27 |
| 2026-07-12 | Graded New | NTSC-J | €99.62 |
| 2026-07-12 | Complete in Box | NTSC-J | €35.20 |
| 2026-07-12 | New (sealed) | PAL | €55.58 |
| 2026-07-10 | Item only | NTSC-J | €34.97 |
| 2026-07-10 | New (sealed) | NTSC-J | €90.53 |
| 2026-07-10 | Manual Only | NTSC-J | €8.80 |
| 2026-07-10 | Item only | PAL | €28.30 |
| 2026-07-10 | Box Only | NTSC-J | €14.07 |
| 2026-07-10 | Manual Only | PAL | €10.11 |
| 2026-07-10 | Box Only | PAL | €29.25 |
| 2026-07-10 | Graded New | NTSC-J | €99.58 |
| 2026-07-10 | Complete in Box | NTSC-J | €35.18 |
| 2026-07-10 | Complete in Box | PAL | €73.42 |
| 2026-07-10 | New (sealed) | PAL | €55.56 |
| 2026-07-10 | Graded New | PAL | €61.11 |
| 2026-06-18 | Manual Only | NTSC-J | €8.68 |
| 2026-06-18 | New (sealed) | NTSC-J | €89.29 |
| 2026-06-18 | New (sealed) | PAL | €54.80 |
| 2026-06-18 | Item only | PAL | €23.79 |
Market insights
Rarity & condition
Alien Syndrome has a steady sales history on the tracked marketplaces, meaning enough copies circulate to establish a reliable market price.
Complete-in-box (CIB) copies typically command a premium over loose cartridges/discs because the original box and manual are more fragile and get discarded or damaged over time — fewer complete sets survive.
Frequently asked questions
How much is Alien Syndrome worth?
Alien Syndrome for Sega Game Gear is currently worth €63.56 loose, €73.46 complete in box, and €55.58 factory sealed. Prices are based on real sales and update regularly on Gamevaro.
Is Alien Syndrome rare?
Alien Syndrome has a steady sales history on the tracked marketplaces, meaning it trades hands regularly and isn't considered particularly rare.
What's the difference between loose, CIB and sealed for Alien Syndrome?
Loose means cartridge or disc only, CIB (complete in box) includes the original box and manual, and sealed means factory-sealed and never opened. For Alien Syndrome, loose is €63.56 and CIB is €73.46 — CIB commands a premium because original boxes and manuals are fragile and often don't survive.
Ratings & Reviews
Also on other platforms
More Sega Game Gear games
