I think they fall under the Window of NEC software. But I see the LaserActive stuff as being a different platform as it used a media exclusive to Pioneer only hardware, if dealing strictly with US releases of both hardware and sofware. Now in Japan because there is an NEC branded LaserActive, that's another matter entirely for PC Engine collectors.
I'm aware of the N10s compatibility. The thing is, the N10 wasn't the standard issue for TurboGrafx 16 hardware. Yes it has the widest compatibility of any North American released system in the NEC family. But when I say standard issue, I mean the the original model. The original model has no add-on or peripheral that allows it to play Laserdisc based games.
Could your arguments be any more arbitrary?
According to you, "official" games must be:
1) released on widely-supported media. Popular formats invented by Sony and Phillips are fine, LD's used by Pioneer and Phillips aren't.
2) every required hardware component must be manufactured by the parent video game company and released in every county were their officially-licensed games are sold. The fact that NEC only supplied half of the U.S. hardware nullifies the official-ness of their North American LD games. Japanese games are fine because NEC slapped their name on a licensed Laseractive.
3) all required hardware must be "standard issue", that is, somehow compatible with whatever first-generation hardware the console appeared on (contradicting your statement that Japanese LD-ROM's are part of the PCE set).
None of this makes any sense. The bottom line is LD-ROM games are officially licensed and running on complete TG/PCE hardware from the NEC PAC. Still, I'll humor your points for the sake of argument.
Media: it doesn't matter what the format is. Some formats take off and become popular (CD, DVD, Blu-Ray), some languish with their parent company (LD, minidisc, GD-ROM, HD DVD etc). The TurboGrafx had already dabbled in two formats, adding a third doesn't mean it's suddenly a different console. The media is completely irrelevant.
Hardware: again, the N10 contains a fully functional TurboGrafx. There are no significant hardware differences. It's not even a SuperGrafx. The backgrounds streaming off an LD-ROM are no different than redbook audio streaming off a CD-ROM.
Licensing: yes, Pioneer hardware was required to play LD-ROMs in the US in 1993. So what? Panasonic hardware was required to play 3DO games. JVC made a Sega. The SNES has a Sony chip. TTI was dead in the water and couldn't even bring 6-botton controllers to the U.S. Allowing Pioneer to house their hardware and supply the optical drive doesn't change the processing hardware or distance the N10 from the "NEC family".
Standard issue: seriously, WTF. Your "standard issue" U.S. hardware was dead by 1993 and barely even got SCD compatibly. The 3.0 card came well after the Duo's release, was never sold in stores, and only sold a few hundred units. By your logic, the Duo and its line of SCD games would be a different platform if not for the belated, pitiful release of the 3.0 card. Just because the line of LD-ROM games never became popular enough for TTI to make some kind of TG16-to-Laseractive interface doesn't mean the TurboGrafx housed in the N10 isn't a TurboGrafx.