Comment by qingcharles

I had to look up which PC games had an option to use the x87:

- Vette! - Falcon 3.0 - Quake

And some others:

https://www.mobygames.com/attributes/attribute/115/

Apparently the 87/287/387 weren't that good as a gaming co-pro as the marshaling of the data to/fro from the CPU was too slow. It was a lot better on the 486DX onwards, I guess.