The Update 22: Plains of Eidolon Title update for Warframe has 7 achievements worth 220 gamerscore.
Explore all of the Eidolon Caves
Craft your first Zaw
Kill 100 grounded enemies while in Archwing Mode above the Plains of Eidolon
Defeat an Eidolon Teralyst
Travel over 500 meters in a single slide across the Plains of Eidolon
Complete the Saya's Vigil Quest
Survive a night on the Eidolon Plains