Here is the full list of all 20 The Culling achievements.
Reach 50 Mandroids defeated in Advanced Survival Mode
Reach 20 hours of time alive in Online Matches
Travel 100 KM in Online Matches
Get 100 Career Kills
Complete the Basic Survival Mode
Win an online Team Match
Play an online Team Match
Get 25 Career Kills
Play 10 online matches
Earn 400 FUNC in a single Online Match
Get 10 Career Kills
Get 5 Kills in a single Online Match
Call in a personal airdrop in an Online Match
Win an online Solo Match
Deal 200 damage in a single Online Match
Play an online Solo Match
Get 3 Kills in a single Online Match
Win an offline match
Play an offline match
Complete the Tutorial