No Achievements??

I'm currently playing Halo 5 with the Free Play Days promotion. I was playing for a few hours when I realized I haven't been unlocking achievements. I'm already on Mission 6 in the Campaign and nothing's unlocked. Is it because I'm using Free Play Days?
It's not even limited to the Campaign Mode because I've done other stuff like customize my armor and emblem, which should have gotten me achievements.

:)

 

Multiplayer Achievements - No No No!!!

I loved BFBC2's and Halo 3's online achievements I had a lot of fun playing those because it makes you try a variety of different things that I wouldn't have usually done. What I hate are games that should be purely SP, but tack on a bad online mode and
add achievements to get people to try and play.

 

Multiplayer Achievements - No No No!!!

The irony is that no one really cares what other achievements another person unlocks. No one will ever loose sleep because you got an achievement they didn't, and likewise I'm sure whom ever is reading this could care less what other ppl have unlocked.

Yes, it's fun to compare. But ultimately it's for personal pleasure. No one will care that you spent hours boosting a match. It is all just for personal entertainment.

I love collecting those tiles in my collection for 100%. But if you have to go way out of your way for MP achievements, is it worth your time getting 70GS to complete your game, when you could have played 3 other games you have been interested in a long
time?

 

I think it is because the free play days. If you want achievements you probably have to buy the game.

 

You can earn achievements during the free to play promotion.

Are you connected to the internet and XBL? Have you gone into the achievement list to see if the notifications just aren't showing for you?