I've got a haphazard collection of some of the old ROA fighting games I can upload. The file hosting that the RSaga devs use has always been confusing because they have three or four separate games on there, and tend to upload in the form of tiny updates more often than complete or playable builds.
Here's three ROA fighting game builds from my old files. I've given them names in brackets to help distinguish them.
ROA fighting game
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(Classic) : so called simply because it was the first one I played. Features a choice of characters, all of which go through the same set of 4 levels if I recall correctly.
(Brown Manta Survival) : A later made build, with a much more polished feel, extra attacks and movement abilities, and slicker animation. Only one character and enemy, with only one stage. It is actually possible to win if you can defeat enough enemies.
(Three Red Manta) : A slightly odd build. Some of the characters play like they do in "Classic", whilst Rydia and Riesz seem to get a bugged 1st stage that won't complete. The 'Nude Rydia' character however gets a special stage where you and two allied characters are fighting three red manta. The red manta are special in that once they penetrate someone, they can't be made to let go and that character is out of the fight. For a special challenge, try to complete this stage without letting your friends get raped. It's not easy.
(((I just tested the three manta one right now, and for some reason it crashes on me intermittently. Didn't used to. Perhaps it will work ok for you? *shrug* )))
If you want a method to adjust the difficulty on any of these, you can edit the game speed in the options menu (if you can figure out which slider it is) or by changing the number in the game.ini file, at...
"Editor.TestPlay.GameSpeed=7"
Lower numbers are faster. The faster the game, the less time you have to react accurately, and the harder the button mashing to escape/recover will be.
I also have a personal build of the other RPG battle style "R-Saga" game, that I like to think is fairly neat, if anyone was interested in that. Been slowly working on it over time. It's complete with English patch, a good bunch of bug fixes, and various fixes and additions I've been doing on the side. I took the liberty to disable a lot of the lower quality or just plain unsexy enemies and player characters, plus have edited a fair amount of stats and attack type priorities to make fights more interesting, and to lean towards the more ero based attacks. Fixed some broken hitboxes and position data on a few enemies. Disabled some stupid one hit kill attacks, and things like that. I've even experimented with adding in a new attack skill, a new monster, battle backgrounds, some pretty startup screens, some new 'Event' battles, and other stuff I probably forget about.