So, just to clarify, because I'm still fuzzy on the terms for perspectives in older games myself, examples of an oblique perspective can be seen in many older RPGs (Earthbound, Final Fantasy, Secret Of Mana, etc.).
I've seen many games created in this perspective that utilize a more action-oriented style of gameplay in which one can see various physical interactions at work, such as projectiles, jumping, friction, and more. (Alundra is one that always stands out in my mind)
My question is: How are the physics often being done from a design/engine perspective in these games? Are there common practices for this sort of game design?