I guess that's also a problem of the then-and-now. Laws haven't changed that much, but the application has. When RPG-Maker was established in... about 15 years ago, there weren't any virtual console games etc. and the RPG Maker 2000 was not available for purchase in Europe. So everyone who used it, had to download it for free, because some Russian guy, Don Miguel, translated it and offered it for free download.

In these times my internet at home was at single-lane ISDN-speed (64 kBit/s) which meant that the download of the standard RTP took - I guess - 45 minutes to one hour. There was no Youtube and Google not the search engine of the choice. I guess I used "Metager". Vampire's Dawn was the first game I played and my first project I made myself was made from resources offered by RPG-Maker-Download pages or pixel them myself. A lot of them were ripped of the classic games like Chrono Trigger, Terranigma, etc. It was very common. No one had a problem with that. No one had even a problem with emulators and ROMs.

In 2009 the virtual console was established by Nintendo. And the old-games were re-released because of nostalgia and because of the fact that more and more people got rid of their old consoles due to the lack of CRT-screens and because there were more and more console generations in-between. I cannot connect my Super Nintendo Entertainment System to my TV, because the picture is outrageous and the input lag makes it impossible to play. So - of course I can use an emulator, but the video game industry discovered that they can milk the old games again - for a low price - but profitably. And HDMI-able mini versions of the old consoles with a best-of-choice of their games sell like hot cakes.

Thatwhy the companies have a commercial interest in their old games, which - I think - they didn't have 10 years before. And copyright will be applied like never before.

That's also a serious problem. You know about file-sharing-warning-lettes? This is a German speciality: In Germany lawyers can write to you a warning letter and ask for money for just the letter. And not 10 or 20 or 50 Euros, no... mostly about 500 to 1000 or even 3000 Euros (especially for brand cases - even if unintentional). For a single letter. Also the cautioned has to sign a "cease and desist declaration with penalty clause". If he uses a lawyer himself, he can leave out claims for compensation in a by his own defense lawyer modified cease and desist declaration with penalty clause. So this might be not that expensive. Of course this is moneymaking business and we have more than enough law offices who "defend" the companies in cases of copyright infringement. These lawyers also search cases for themselves. Although every idiot meanwhile knows that file-sharing is a 100% chance to gain such an expensive invoice, there are still enough trying it.

But of course many more cases exist: If you sell anything in eBay or if you use a photo for a homepage as if you don't own every right even it's Creative Commons. If you use a name for a local business which could be also in use by another local business... So a single ripped resource or MIDI is meanwhile a reason for not accepting a game.

I read that you started your game in 2005. I started also a game in 2003 and developed it with friends until 2007. But I would never publish it, because it contains some MIDIs from other games and resources from some other games. Like many projects did. But today it is absolutely out of the question. Then we didn't know the law case but now - everything has to be either self-made or at least the rights have been cleared. 10 years many and me believed that it was a legal grey area to use resources from old games which were not published anymore. Today it's clear. There are plenty of creative-commons-resources to use. But I don't have the time and fun to reintroduce legal resources in an old game which lies fallow for almost ten years and where I lost the interest. It's a shame, because you're game looks like a monster-boy-fan-game. According to the SEGA-logo I assume this is your intention.

But you have to understand the forum's staff. They have a risk of a warning letter with expense, if they leave the download link to your game unremoved. Because you are from outside Germany, you have nothing to fear. But the guy in the impressed has to pay for all this.