Originally Posted by amnesiac
No, I think it's:
Halo 1 multiplayer w/ Halo 1 maps
Halo 2 multiplayer w/ Halo 2 maps
Halo 3 multiplayer w/ Halo 3 maps
Halo 4 multiplayer w/ Halo 4 maps + 6 remade Halo 2 maps
Am I right or way wrong?
Right except the remade Halo 2 maps. They play within the original Halo 2 multiplayer, and you can simply select an option to switch between new and old graphics, including during the multiplayer for these 6 maps. All the other Halo 2 maps simply don't have a "new" graphics layer created for them.
They've done the same thing for Halo 2 Anniversary that they did for Halo CE Anniversary - you have the ability to switch between new and old graphics engines. The rest of the code, such as physics and gameplay are left intact.