DosBuster
Arcane
Alright, so it does in fact seem like even in an European court Zenimax would prove successful.
https://en.wikipedia.org/wiki/Idea–expression_divide
https://en.wikipedia.org/wiki/Idea–expression_divide
The European Union Software Directive, Article 1.2, for example, expressly excludes from copyright ideas and principles that underlie any element of a computer program, including those that underlie its interfaces.