How to unlock new maps in halo 5?

Games Halo 5: Guardians
1

so I’m bored of playing the same few maps in halo 5. 4v4 slayer 4v4 is there a way to unlock new ones? And how? Thanks

2

Each playlist has a set rotation of maps. They have not changed for years. I would try a different playlist? BTB, Super Fiesta, Elimination each have some unique maps. But if you only play Slayer then the maps will always be the same.

3

I miss the old BTB super fiesta maps. They were perfect!