Here is the full list of all 19 Dune: Imperium achievements.
Complete the Tutorial
Complete all Normal Challenges
Complete all Heroic Challenges
End a game with 15 or more Victory Points
Win an online game
Win 25 online games
Win a conflict with 30 or more strength
Harvest 6 or more spice from a Spice Trade space
Get to the top of an influence track
Score 2 Victory Points in a single game from Plans within Plans
Score 2 Victory Points in a single game from Corner the Market
Win a game by the spice tiebreaker
Trash 50 cards
Place the Mentat 25 times
Win a conflict that takes place in a location you control
Win 3 conflicts in a row in a single game
End a game with 5 or more Fremen cards in your deck
End a game with 5 or more Bene Gesserit cards in your deck
Retreat 25 troops