Here is the full list of all 15 Mushroom Wars achievements.
Capture an enemy building without having any of your own
Earn all rewards in all Campaign levels
Achieve victory on all Skirmish maps on highest difficulty
Complete Campaign on highest difficulty
Achieve maximum attack level
Upgrade your village to level 5
Achieve level 5 morale
Earn all 9 rewards in a single Campaign level
Win a Skirmish game
Earn each reward at least once
Complete Campaign
Complete Campaign in under 60 minutes.
Capture 300 enemy buildings
Encounter aliens in Campaign
Encounter forest warriors in Campaign