Here is the full list of all 16 RESEED achievements.
The base game contains 8 achievements, and there is 1 DLC pack containing 8 achievements.
Rescue all seeds from normal missions.
Obtain all medals from normal missions.
Rescue all seeds from special missions.
Obtain all medals from special missions.
Save your first seed.
Save 5 seeds.
Save 10 seeds.
Save all the seeds.