Altered Beast behaves strangely in FBA.

Moved from the issues list from RetroArch.

There seems to be an issue with one of the Sega System 16 games "Altered Beast", where some enemies appear without heads and do not disappear when killed. This is present in RetroArch 0.9.8-beta2 on both Windows and Linux. It also occurs when using the libretro build of iMAME4all, which is odd because the Android version is fine. Other System 16 games such as Golden Axe, Shinobi, Out Run and such appear to work fine.

This is visible immediately after the game has been started, with the first wave of enemies on the first level. I tried the same ROM in the original Final Burn Alpha emulator version 0.2.97.28, and the issue does not occur. Discussed further here:

http://forum.themaister.net/viewtopic.php?id=229

Here is a screenshot:

Want to back this issue? Post a bounty on it! We accept bounties via Bountysource.

Start by reproducing the Altered Beast issue in the libretro FBA build using the first level's first enemy wave, then compare its behavior with Final Burn Alpha 0.2.97.28 and the Android iMAME4all version. Done means enemies render correctly and disappear when killed, without affecting the other System 16 games mentioned.