MAME 0.81u1 was a dev-sync update, and was never released to the public.
The known contributors for this version are, in alphabetical order:
The known contributions for this version are, in the order specified in the whatsnew:
- smf fixed a bug with the Beastorizer hi-score portraits
- Partial Raiden 2 Sprite Decryption (check sprite gfx with viewer, F4)
New games marked as GAME_NOT_WORKING