Venture into the underworld in SEGA’s legendary beat ‘em up Altered Beast, now available on mobile. Play free and fight your way through the legions of hell!

Risen from the grave to fight the terrors of Hades – you are the Altered Beast. Morph into killer predators using mystical power orbs, then claw, maul, and hack your way to the depths of hell to rescue Zeus’ daughter, Athena. Combat waves of demons, overcome grotesque boss battles, and tear the armies of the damned limb from limb!

Altered Beast joins the SEGA Forever classic games collection, a treasure trove of free SEGA console classics brought to life on mobile for the first time!

- Five hellish levels of undead terror, each with their own nightmarish boss battles
- Transform into apex predators – morph into a wolf, bear, tiger, or dragon – each with their own devastating attacks
- Collect mystical power orbs to boost your strength and attack power
- Combat demons from the ruins of ancient Greece to the depths of hell
- All cheat codes from the original present and working

- LEADERBOARDS – compete with the world for high scores
- CONTROLLER SUPPORT: MFi compatible controllers
- GAMES RELEASED EVERY MONTH - Download them all!

- "A coin-op conversion to the letter" [87%] - Robin Hogg, The Games Machine #19 (June 1989)
- “If you're a fan of beat 'em ups, this one's made for you.” [87%] Computer & Video Games Complete Guide to Consoles Vol. 1 (1989)

- Altered Beast originally featured twice as many action moves, but these were stripped out to make the gameplay simpler and more fun
- The arcade version’s ending implies the entire game was just a play, with the demons being nothing more than actors wearing monster costumes!
- Neff's Rhino form makes a cameo in Wreck-It Ralph (2012) as a member of the Bad-Anon villains support group

- Originally released in arcades worldwide in 1988
- Altered Beast was a Genesis pack-in title in North America
- Altered Beast was officially ported to NEC's PC Engine and CD-ROM² systems

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Game apps are ad-supported and no in-app purchases are required to progress; ad-free play option available with in-app purchase.

This game may include "Interest Based Ads" (please see for more information)​ and may collect "Precise Location Data" ​(please see ​for more information)​.

© SEGA. All rights reserved. SEGA, the SEGA logo, ALTERED BEAST are registered trademarks or trademarks of SEGA Holdings Co., Ltd. or its affiliates.

What’s New

Version 4.1.0

Bug fixes and refinements

Ratings and Reviews

4.3 out of 5
458 Ratings

458 Ratings

a random Anna main. ,

Great Game, with one exception

Great Game, I really only have one minor gripe is that you have to pay to be able to play it without ads. You have to pay $2.00 USD in order to be able to play the game and not have intrusive ads ruining your fun. If whoever does the Sega Forever line of classics can stop this two dollar B.S. just for a quick $2.00 from someone paying to get it without ads? Really? If your going to make someone pay for the full game without ads anyway why don’t you just have them pay $2.00 to even play the game I’ll continue to play the game once but, until there’s an update where we can play the game without ads and not be out $2.00 for this scummy business model. I don’t mind paying for extra characters in like say a fighting game since that my favorite genre but, come on really $2.00 to play the game with no ads?

Callum192 ,

A Pleasant Surprise

Altered Beast is one of those games that you remember being terrible from childhood, but when I decided to pick this up on mobile I was pleasantly surprised. The controls are great, the levels have variety, the bosses are simplistic yet satisfying and the presentation is atmospheric. I’m really starting to wonder why so many people overlooked this title as the pack in game for the Genesis before a certain blue hedgehog came along.

Eight Hours Day ,

Game is fun - controls need improvement

This is the old nostalgic 16-bit arcade game of the 90's, and is still fun to play. Game is pretty straight forward, you're a Greek warrior resurrected from the dead to kick and punch the mess out of the zombies / monsters till you reach the stage boss. The biggest complaint I have of this port to iOS is of the virtual game pad and buttons - I've noticed the response is laggy, at best which causes frustration. Otherwise, it fun to play to pass the time.

Developer Response ,

Hi there, thank you for your feedback! I've forwarded this to the developers, who will be reviewing suggestions and problems players experience to help them plan future updates. If you would like to share any additional feedback please contact us at


Sega America
146.5 MB

Requires iOS 9.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating
Infrequent/Mild Cartoon or Fantasy Violence
In-App Purchases
  1. Premium Upgrade $1.99


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