Skip to product information
1 of 3

Altered Beast | SEGA Master System

Altered Beast | SEGA Master System

Regular price $24.96
Regular price Sale price $24.96
Sold out
Shipping calculated at checkout.

Availability: Low stock: 1 left

State of Item
What's included in each condition?
Brand New/Sealed
Brand new, unopened, factory sealed.
Complete in Box
Pre-owned game, original manual, and original box or case. Other inserts may be missing. A damaged or missing case may be replaced.
Game & Case
Pre-owned game with a case and original artwork. A damaged or missing case may be replaced. A manual is not included.
Custom Case with Game
Original game with a new replacement case and professionally reprinted cover art.
Game Cartridge Only
Game disc or cartridge only. No case or manual.

Review the listing for any copy-specific notes, artwork variations, and included extras.

🎮 THIS GAME COUNTS Buy 4+ games, save 10%
Shop more Master System games
View full product details
EXPLORE THE GAME

Altered Beast

SEGA Master System

Altered Beast

You are a hero raised from the dead by the god Zeus to rescue his daughter Athena. With scenery inspired by Ancient Greece, you have to fight hordes of undead and demons, with a boss at the end of each level until you meet the god Neff, who holds the girl captive.

The Altered Beast title refers to your shapeshifting abilities. In this platformer, you can collect spirit balls by defeating two-headed wolves, allowing you to mutate into different beasts such as a werewolf, a dragon, a tiger, a bear and others depending on the version. Each form, tied to a level, comes with special abilities such as flight and powerful attacks, easily superseding the basic set of punches and kicks in your human form.

The game can be played in single player mode, or in same-screen multiplayer co-op mode.

⭐ Condition Explanations

Brand New/Sealed: Brand new, unopened, factory-sealed.

Complete in Box: Pre-owned game with original manual and original box/case. Other original inserts may not be included.

Game Disc/Cartridge Only: Game only, with no manual or case.

Game & Case: Game with case and original artwork. A damaged or missing original case may be replaced with a new aftermarket case.

Custom Case with Game: Original game with a new case and professionally reprinted cover art.

📦 Free & Speedy Shipping

Free U.S. shipping applies to eligible orders of $199.99 or more after product discounts, before tax and shipping, when the shipping rate is $50.99 or less.

Most items ship within 1–2 business days. Shipping cost is calculated at checkout.

🎖️ Peace of Mind Guarantee

Buy with confidence. Eligible pre-owned gaming products are inspected, cleaned, and tested before sale.

We offer 14-day returns and a 90-day warranty on eligible pre-owned gaming products for functional issues under normal use.

View Warranty & Return Policy

📚 Game Guides & Collector Resources

Explore guides related to SEGA Master System.

How to Store Retro Games →

Spot Fake Retro Cartridges →

💵 Sell Your Old Games to Zypher

Clearing out games you no longer play? Search Zypher's live Buy List to see what we're currently buying, compare offers by condition, and build a sell list for cash or Zypher store credit.

Sell Retro Games →

Browse all live Buy List values & build your quote →

✓ Tested, Refurbished, & PreparedPre-owned video games are professionally inspected, cleaned, tested, and prepared by Zypher.
🛡 90-Day Zypher WarrantyEligible pre-owned games are backed by our 90-day functional warranty.
🎮 Build Your Collection & SaveBuy 4+ eligible video games and save 10% automatically at checkout.