Here is the full list of all 44 Rogue Stormers achievements.
Kill 200 Goblins Elites with Brecht
Destroy 150 Sharkopede Grubs
Collect a total of 20,000 gold pieces
Recruit Stabbygale
Recruit El Cazador
Destroy 200 Robocopters with Camille
Kill Mørkenrav twice
Kill 1000 Goblin Rioters
Destroy the Dreadwalker boss twice
Recruit Camille
Kill 2500 Goblins
Kill 50 Orc Slavehunters
Kill 1000 Goblins
Heal a total of 250 HP
Recruit Presto
Heal yourself for the first time
Kill 100 Gloomshrouds with Brecht
Kill 250 Goblin Suicide Bombers with Stabbygale
Kill 100 Orc Plasma Gunners with El Cazador
Defeat the Dreadwalker, Green Baron and Mouse Panzer bosses with Camille
Complete the game 7 times with El Cazador
Collect a total of 50,000 gold pieces
Complete the game 7 times with Camille
Kill 50 Orc Berserkers with Presto
Destroy 100 turrets with Presto
Kill 1000 Goblins with El Cazador
Kill 75 Orc Grenadiers and 25 Orc Minethrowers
Kill 33 Orc Shotgunners with Camille, Brecht and El Cazador
Destroy the Mouse Panzer boss with every Rogue Stormer
Defeat the Dreadwalker, Green Baron and Mouse Panzer bosses with Stabbygale eight times each
Heal a total of 5000 HP
Examine the Supercalifragilistic Umbrella and the Young Grasshoppah with El Cazador
Examine the Wee Wizard Hat with Stabbygale
Destroy 1000 turrets
Complete the game 20 times
Examine the EM Device
Complete the game 50 times
Kill 1000 Goblin Elites
Examine the Kinked Barrel and the Minigun
Complete the game twice
Kill 10,000 Goblin Rioters
Destroy the Mouse Panzer twice
Examine the Rusty Drill and the Suspension Spring
Kill 50 Goblin Gas Grenadiers with Presto