Having looked through these, I can say that there may be some very, very light spoilers here but they seem relatively harmless. However, if you are going to be one of those super uptight people, then you can't say I didn't warn you.
- Down in the Briney
Took a Bathysphere ride in Burial at Sea - Episode One.
- Burial at Sea
Completed Burial at Sea - Episode One.
- Audio Enthusiast
Collected all Audio Diaries in Burial at Sea - Episode One.
- Fully Equipped
Purchased any two upgrades for Old Man Winter or Radar Range in Burial at Sea - Episode One.
- Confirmed Luddite
Destroyed ten Turrets in Burial at Sea - Episode One.
- Cook and Serve
Made 5 enemies explode with the Radar Range in Burial at Sea - Episode One.
- Chain Reaction
Damaged fifteen foes with an exploding enemy, using the Radar Range in Burial at Sea - Episode One.
- Break the Ice
Shattered 5 enemies who had been frozen with Old Man Winter.
- Snowball Effect
Froze 2 enemies with the same Old Man Winter trap.
- Going Places
Rode the tram in Burial at Sea - Episode One.
Took a Bathysphere ride in Burial at Sea - Episode One.
- Burial at Sea
Completed Burial at Sea - Episode One.
- Audio Enthusiast
Collected all Audio Diaries in Burial at Sea - Episode One.
- Fully Equipped
Purchased any two upgrades for Old Man Winter or Radar Range in Burial at Sea - Episode One.
- Confirmed Luddite
Destroyed ten Turrets in Burial at Sea - Episode One.
- Cook and Serve
Made 5 enemies explode with the Radar Range in Burial at Sea - Episode One.
- Chain Reaction
Damaged fifteen foes with an exploding enemy, using the Radar Range in Burial at Sea - Episode One.
- Break the Ice
Shattered 5 enemies who had been frozen with Old Man Winter.
- Snowball Effect
Froze 2 enemies with the same Old Man Winter trap.
- Going Places
Rode the tram in Burial at Sea - Episode One.
As far as I'm aware, there still isn't a set release date for this DLC yet. I'm assuming it's going to be released very shortly, however, given that the achievement list has been finalized. But you just can't ever tell for sure with these things!
More pictures and info can be found at the Irrational Games website.
