Master System

Altered Beast

In this coin-op conversion, you are a hero raised from the dead by the god Zeus to rescue his daughter Athena. With a 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 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 kick...

Genre: Beat-'Em-Up
Year: 1989
Developer: SEGA Enterprises Ltd.
Publisher: SEGA of America, Inc.
Players: 1

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P2P Netplay available on compatible cores

Achievements

15 achievements · 212 total points

Easy Mode Starts the game with 2 extra life bars.
1 pts
Surrender, you loser! Use 4 continues.
1 pts
Graveyard Finish stage 1.
5 pts
Cave Finish stage 2.
5 pts
Neff Castle Finish stage 3.
5 pts
Underworld Finish stage 4.
10 pts
Roman Centurion Transform into a werewolf in stage 1 without taking damage.
5 pts
Weredragon Transform into a weredragon in stage 2 without taking damage.
10 pts
Weretiger Transform into a weretiger in stage 3 without taking damage.
25 pts
Werewolf Transform into a werewolf in stage 4 without taking damage.
25 pts
Aggar Defeat Aggar without taking damage.
10 pts
Octeyes Defeat Octeyes without taking damage.
10 pts
Crocodile Wyrm Defeat Crocodile Wyrm without taking damage.
25 pts
Nefarious Neff Defeat Neff without taking damage.
25 pts
Athena Score 400,000 points.
50 pts

Altered Beast leaderboard

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Altered Beast frequently asked questions

How do I play Altered Beast online with a friend?

Altered Beast (Master System) can be played online with friends using Etera's P2P netplay. Create a room in the launcher and invite your friend, who joins through the invite. Step by step:

Download the Etera launcher for Windows or Linux and create your account.
Ask your friend to do the same and add them to your friends list.
Pick the game in the library and create a netplay room.
Invite your friend: they accept the invite and join the room.
The launcher keeps dependencies on the same version for both players, avoiding desync.

How do I play Altered Beast on PC?

Download the Etera launcher (Windows or Linux), find Altered Beast in the Master System library and click to download. The launcher handles the emulator and setup for you.

Does Altered Beast netplay lag?

Etera uses a direct P2P connection between players, which usually means low latency. Results depend on each player's internet quality.

Does Altered Beast have achievements?

Yes, Altered Beast has 15 achievements worth 212 points. Achievements are counted and saved to your history and the leaderboard for subscribers and during the trial period.

Can I play Altered Beast for free?

Yes. Every account gets a 5-day trial with premium features. After that, the free plan allows 3 new games per day and 1 netplay session per day. Premium raises those limits.

Play Altered Beast on Etera

Download the launcher for Windows or Linux, find this game in the library and play solo or with friends.