I'm working on a program that takes inspiration from RPG Maker. I've developed the software entirely from scratch, but the user interface and event system are somewhat similar to RPG Maker's design. Unlike RPG Maker, my program processes event pages through code instead of a visual interface.
I know about EasyRPG, which is a clone of RPG Maker 2003, and I initially thought I might be in the clear with my project. However, since my work draws inspiration from a more recent version that incorporates scripting, I'm concerned about legal ramifications. My code is entirely original, but some class names like 'Scene' and 'Window' are similar.
My program also includes unique features that differentiate it, such as custom event creation macros. In contrast to RPG Maker and Wolf RPG Editor, it doesn't come with visual programming. Additionally, my software does not include any built-in assets. With all that in mind, I'm primarily wondering about potential issues with code and patents. Am I on solid legal ground here?
5 Answers
So far as I know, taking inspiration from an interface design typically doesn't land you in hot water—there's not much legal protection for that. However, if your software becomes too similar, you could invite scrutiny from RPG Maker's copyright holders. Just tread carefully!
If you're at a point where you're questioning the legality, it's worth considering that it might be close enough to raise concerns. If anything ever escalates, like a lawsuit, it could cost you a lot to defend yourself regardless of the legality. Better to play it safe!
The legal landscape can be confusing, but remember that imitation isn't automatically illegal unless you're directly copying their assets or branding. There are plenty of clones out there, and as long as you’re not selling your software commercially, you might fly under the radar. Just remember that you could attract more attention if you decide to sell it down the line.
I think your angle is sound! Just focus on making your unique contributions clear and steer clear of directly copying anything too recognizable from RPG Maker. It's all about the nuances of what you build on top.
It's tricky territory. While RPG Maker doesn't have an exclusive claim on the concept of RPG creation software, you may need to be cautious about patents or trademarks. If you use similar names or infringe on copyrights, that could invite legal trouble. If you're seriously concerned, talking to a lawyer is actually your best bet, even if it might be out of your budget.

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