What maps are on Halo 2 without Halo 2 Multiplayer Map Pack?

[Slim Shady]

I was looking at this website and it said there was 25 maps and I only have 11 Ive beaten the game on easy but i don t have all the levels on multiplayer do I need to buy the Multiplayer Map Pack and if I do arnt there only 7 maps on it

 

[uhohMESIAH]

Clock the game on legendary and get an extra map called foundation..