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