Here is the full list of all 43 STAR WARS Battlefront II achievements. It takes around 60-80 hours to unlock all of the achievements on Windows.
In Multiplayer, defeat 150 enemies with the Heavy's Sentry Gun.
Defeat 500 enemies as a hero on any Multiplayer map.
Complete the mission "Inferno".
Complete the mission "Ashes of the Empire".
Complete the mission "Project: Resurrection".
Complete the mission "Discoveries".
Complete the mission "Until Ashes".
Complete the mission "The Battle of Jakku".
In the Campaign, destroy eight starfighters in the skies of Jakku.
Complete the mission "Cache Grab".
Complete the mission "Under Covered Skies".
Complete the mission "General Distress".
Complete the mission "Royalty".
Complete the mission "The Outcasts".
Complete the mission "The Storm".
Complete the mission "The Observatory".
Complete the mission "The Dauntless".
Complete the mission "The Battle of Endor".
Defeat 50 enemies in Heroes Vs Villains.
Play as all launch heroes in Multiplayer.
Engage in an Arcade match.
In Multiplayer, defeat 3 enemies within one Vanguard usage 5 times.
Complete the mission "The Cleaner".
Win a match of Strike.
Win one match in each Multiplayer game mode.
Win a match of Blast.
Reach Rank 25.
In Multiplayer, boost 100 allies with the Officer commands.
Complete 25 Multiplayer Milestones.
Win a match of Starfighter Assault.
Win a match of Galactic Assault.
Win a match of Heroes vs Villains
Be the first one to defeat an enemy in a Multiplayer match.
In the Campaign, use the Droid to shock three enemies at once.
In the Campaign, eliminate five enemies at once using the Barrage.
In the Campaign, eliminate a Scout Trooper with Iden’s melee takedown.
Reach Rank 50.
In Multiplayer, get 25 headshots with longblaster rifles.
Get 20 Killstreaks with Interceptor ships.
Defeat 50 enemies using Dual Proton Torpedoes with the Bomber ship class.
Defeat 25 Hero ships with Fighter ships.
Complete all unique Battle Scenarios.
Destroy 25 objectives in Starfighter Assault.