Originally Posted by UltraMega
All EAX really does is add a reverb/echo effect. The reason you don't see EAX games anymore is because most game engines would have this kind of thing or something better built in, so just play any modern 3D game and you'll basically be getting EAX type effects already.
EAX was basically long dead by the times games like Battlefield 3 came along, which I use as an example because of how good the audio in that game is.
That said... Far Cry 2 would be a good one.