Okay, so I'm going to pretend there was something beyond casual sexism for your last sentence, and focus on the fact that Undertale wasn't operating too far outside the normal mechanics of the rpgmaker engine in itself. It simply did what games like Shrift and MGQ
![Stick out tongue :p :p](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
aradox do, which is manipulating certain elements in the engine for a desired mechanic. I'm not a dev myself, but I imagine I could get the same results as Tobey did if I made the investment. The mechanics all apply numerical values to certain behaviours, which involve "if" and "when" triggers.