Here is the full list of all 51 METAL GEAR SURVIVE achievements.
Thirty crew members are among your ranks
You successfully defended Base Camp with no losses incurred
Other classes were added
You defeated 300 creatures using Interceptor Units
You achieved a performance evaluation for a Salvage Mission
You played a Salvage Mission
You opened a HARD difficulty container flawlessly
You used the Analeptic (Revival Pill) for the first time
Your crew completed their first Dispatch Mission
You defeated 300 creatures using thrusting weapons
You did your first harvest
You completed your first Order
You learned your first skill
You constructed your first building
You cooked your first meal
You did your first hunt
You crafted your first item
You defeated all Boss Creatures
You raised all skills to their highest level
You completed every wave in every Salvage Mission
You defeated 300 creatures using one-handed weapons
You defeated 300 creatures using two-handed weapons
You defeated 300 creatures using heavy weapons
You defeated 300 creatures using bows
You defeated 300 creatures using Defense Units
During Salvage Missions, you revived 30 allies who were near death
You completed 50 Salvage Missions
You explored the entirety of both maps
You survived 140 days, 15 hours without dying
You earned 30 first place score rankings when completing the final wave in a Salvage Mission
You ate all food
You obtained all weapons and gear
You skewered 50 creatures using the Foot Press skill
You defeated 300 creatures using the Auto Turret