Here is the full list of all 10 BULLETLINE achievements.
Score 5 kills in a row without dying
Kill someone with a headshot
Score 3 kills in a row without dying
Kill the elite crone
Survive a rocket launch
Score 10 kills in a row without dying
Win a 1 v 3 Supremacy match
Win a 1 v 3 Cash Grab match
Win a 1 v 3 King match
Win a 1 v 3 Sniper Wars match