If anything I create runs properly on a classic amiga, even 68040 with 3Tb of fastmem, I'm already happy
Checking source code of some old games I got my hands on, it's clear that game devs shoehorned their games to fit 512k chip or even 512k total. It often involved hacks and changing a constant in the code often results in corruption because of something else implicitly depending on that constant (different memory layouts)