Here is the full list of all 27 Hermes: Rescue Mission achievements.
Help the starving people
Revive the nymph
Exile Gello
Exchange 4 items from the merchant
Bring gifts to the altar of Zeus
Repair the bridges
Remove all obstacles from the beginning
Craft the weapons
Exile Hades
Exile the bats
Exile the wolves
Remove the underworld passage
Discover secret paths
Eliminate the flood
Pass half-way
Eliminate the drought
Dispel the darkness
Exile the Cerberus
Repair the statue
Cure the people
Clear the river
Exile the satyrs
Exile the Moirai
Light the Olympus fires
Save the people
Exile the servants of Hades
Restore the temple