Here is the full list of all 30 Cannon Brawl achievements.
Destroy 4 buildings during one blasting of the Flame Thrower
Complete the campaign on nightmare mode. You did it!
Defeat the enemy airship on nightmare mode.
Destroy 1000 buildings.
Defeat the enemy warship on nightmare mode.
Earn all 57 medals.
Destroy 500 buildings.
Build 5000 buildings.
Rank up to Grand Admiral by playing multiplayer
Rank up to Admiral by playing multiplayer
Reflection your laser off two enemy shields to damage another enemy building
Rank up to Vice Admiral by playing multiplayer
Rank up to Captain by playing multiplayer
Defeat the enemy robot boss in Campaign mode
Destroy 250 buildings
Defeat the enemy airship boss in Campaign mode
Reflect your laser off an enemy shield to damage another enemy building
Rank up to Commander by playing multiplayer
Build 1000 buildings.
Rank up to Lieutenant by playing multiplayer
Defeat the enemy warship boss in Campaign mode
Drop the enemy HQ in the water.
Build 500 buildings.
Damage Shield Towers 5 times by shooting around their shields.
Build 250 buildings
Rank up to ensign by playing multiplayer
Upgrade buildings 10 times.
Defeat Insane AI in Battle vs. AI mode without using shields
Win against the insane AI by selecting the warhead as your only attack building (Banks count as an attack build).
Destroy 5000 buildings