I'm sure there's a hardware interrupt somewhere that causes that. Probably designed by a few people, I'm just glad it isn't tied to the system watchdog process and the dude doesn't have to reboot every time sensibilities are offended.

The hardware that goes into every console and computer comes from chip families that are compatible across a wide range of systems. The NES and SNES used 74xx series chips - yes, if you're an EE grad, those are the same ones we used in our 101 courses. Unity, while being special tailored to gaming - much the same way the 8 pins of the 7401 were special purposed in the NES - isn't at all special, it's a collection of routines, systems, processes, and architectures that people in the game design community found useful, and then packaged nicely; nothing more, nothing less. Just as I can build a NES from CoT parts, I can still build a game without using Unity, it just makes it easier for me if I use what's already there.

I'm sure that those game designers also used math, physics, computers to program things on, software architecture practices, written language, used food and drink for fuel, slept on bed - in houses, etc; all things that were created by others, many well before their time on this planet. Should those be counted as well, and when I'm working on my next project, should I be thanking Euler and Pythagoras in the credits?