The Heart of Gold Add-on for War for the Overworld has 22 achievements.
Complete level 4 of Heart of Gold
Defeat every member of House Magnanimous in level 4 of Heart of Gold
Complete level 3 of Heart of Gold
Stop the Empire from mining more than 100,000 gold before you complete the Colossus in level 3 of Heart of Gold
Complete level 2 of Heart of Gold without the Empire patrols discovering you
Complete level 2 of Heart of Gold without allowing any Empire patrols to reach the end of the road
Complete level 2 of Heart of Gold
Defeat Lord Coleem in Heart of Gold
Complete level 1 of Heart of Gold
Complete level 1 of Heart of Gold without losing any Sentinels
Find and rescue all Neutral units in level 1 of Heart of Gold
Destroy all 4 Gateways within 30 minutes in level 1 of Heart of Gold
Unlock all 12 artefacts in 40 minutes in level 2 of Heart of Gold
Use the Blood Money spell 100 times in level 3 of Heart of Gold
Gather 500,000 gold in 20 minutes in level 3 of Heart of Gold
Defeat Lord Saffire in Heart of Gold
Destroy all 5 Inhibitors in 25 minutes in level 4 of Heart of Gold
Defeat every member of House Magnanimous and complete level 4 of Heart of Gold without destroying any of the Gateways