Next Gen ZC. (Otherwise known as ZC3.0)

[Gleeok]

- It's not really from scratch as long as the design goals are known ahead of time. Plus there's always ZC and whatever else for reference. There's a lot of 3rd party code and libs available if you need something in particular. There's really no such thing as "from scratch" nowadays.

- ZC is the best damn LOZ1 engine on the planet Earth and don't you forget it.

- America. Fuck Yeah. ..Also prime rib and bikinis.

Why OOP is Important
Instead of having "Enemy" as one object, which it is insinuated, you could have a class for every enemy through inheritance. You can further increase it's capacity with encapsulation and polymorphism which are OOP basics.
Enemy Class Examples: Moblin, Goriya, Darknut, etc.
Then you can go further by making even more subclasses for specifics, and once the evolution has finnished, scripting is required.

Normally scripting is only needed for phase-out, which all patch work has ceased for a particular version (servicing/No Development/No Evolution)

That's exactly how ZC does the enemies.
Another approach is to use scripting so that you can have scripted enemies, since you can never add enough polymorphism in c++ to account for all enemy types that users will create themselves at runtime.