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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Terms of Use:

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 4.0.2

Bug fixes and refinements

Ratings and Reviews

4.3 out of 5
280 Ratings

280 Ratings

Joel Soliz ,


I’m very happy with this game on mobile devices, and it’s a good idea, but when I had this game on my old iPad, it was slow and their was sound problems, and it kept crashing, now I have an IPhone 6, and the game works perfectly fine on the iPhone 6, their is my reason for the four stars rating. I would also like to give a shout out to the developers (Sega) for making this happen. I honestly can’t wait for the Sega Genesis Mini to come out and hopefully this game will be preloaded on that. Anyways, that’s all I have to say about this. #Sega Classics

opperationjudy ,

fix controls tho please

nice little port and brings me back to my childhood days that’s why it gets a 5 star rating. however i keep missing the buttons and controls from pad when playing and this makes it quite difficult to play. it as if you need to keep your eyes on the controls the whole time, which is impossible because you need to keep your eyes on the gameplay or you can’t see what’s happening. a suggestion would to fix would be if you didn’t have to press exactly on the buttons or control pad but at least near them. idk, these controls just don’t work at least give us some options. like, instead of having a picture of gamepad on screen just let us press right left up or down and the game corresponds. it’s just too difficult to hit gamepad exactly correct and i always end up crouching instead of walking. please listen to suggestion that would make this game playable. the 5 stars was for nostalgia ... but i wanna play it!!!

Rivcogent ,

Latest update ruined sound - Fixed

No sound for the game with latest update.

- Update: I uninstalled the game and reinstalled and the sound was fixed. I'm not sure why the update caused a sound issue, but I'm running the latest iOS release. Luckily, reinstalling the game fixed the issue.

Developer Response ,

Hi there, sorry to hear that you are having audio issues with your game, can you send a more detailed message of what is happening to as well as what device and OS you are using, so that we can investigate the issue.


Sega America
152.7 MB

Requires iOS 8.2 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating
Rated 9+ for the following:
Infrequent/Mild Cartoon or Fantasy Violence
© SEGA, the SEGA logo and Altered Beast are either registered trade marks or trade marks of SEGA Holdings Co., Ltd. or its affiliates. All rights reserved.
In-App Purchases
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