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