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 3.1.2

Bug fixes and refinements

Ratings and Reviews

4.5 out of 5

95 Ratings

95 Ratings

Eyyyy SEGA plz read


So I was just playing this game and I was saying to myself, "Wow! This is pretty dope. I could use a SEGA Genesis." So like, I would really appreciate it if you would send me one. I mean, I could always get one from EBay, but I can't guarantee quality and good condition. I'm also pretty sure model 2 SEGA CD's are expensive and a bit rare, so that would also be appreciated. I honestly don't expect you to reply, but if you did, it would be rlly cool. Srsly you should really reply cuz that would make my day. Honestly I don't know why I'm writing this, I'm just bored, but a SEGA Genesis would make me less bored. I took a lot of time to write this review, so even if you don't send a Genesis, you could at least reply. I have no complaints about this game and it's a pretty good port, so this isn't constructive criticism that you need to reply to and assure the person that you'll fix the app's problems, I just hope that you'll be a nice person and reply. Thank you for your time.

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.

Relive my childhood every day on the bus.


I got this game for free, was prompted for a single dollar so ads wouldn't play. And didn't even think twice. This game is so rad that everyone should have it on their phone. And if you don't already, POWER UP!


Sega America
177.8 MB
Requires iOS 8.0 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
  1. Premium Upgrade $1.99


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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