7 nights ago I dreamed about being in the video game halo, I never have before (that I have remembered), and then over the last 7 nights, 4 of them I dreamed about it. And some nights I have multiple dreams about it.
They are always different, but always related to halo. E.g. Last night I dreamed I was going to war but I had alien halo guns and futuristic halo armor, but the night before I was in armor and I was shooting aliens with a rocket launcher.

Why is this happening? I don't mind I'm just wondering.
And is there any good techniques I could use to use this to become lucid?
Like auto suggestion or something?