Here is the full list of all 30 Wild Guns Reloaded achievements.
Unlock all colors for Bullet.
Unlock all colors for Annie.
Beat Single Player on Easy with all characters without using any continues.
Beat Single Player on Normal with all characters without using any continues.
Unlock all colors for Doris.
Beat Single Player on Easy without using any continues.
Beat Single Player on Hard with all characters without using any continues.
Unlock all colors for Clint.
Beat the Desolation Canyon stage without dying.
Beat the Armored Train stage without dying.
Beat the Final Fight stage without dying.
Move Bullet to the top of the screen using the drone.
Defeat the boss of Carson City.
Defeat the boss of Desolation Canyon.
Defeat the boss in the Ammunition Depot.
Defeat the boss in the Gold Mine.
Defeat the boss on the Armored Train.
Defeat the boss of the Underground.
Defeat the boss of the Flying Ship.
Defeat Kid.
Beat Single Player on Normal without using any continues.
Beat Single Player on Hard without using any continues.
Beat the Carson City stage without dying.
Beat the Ammunition Depot stage without dying.
Beat the Gold Mine stage without dying.
Beat the Underground stage without dying.
Beat the Flying Ship stage without dying.
Get a x5 bonus with either Clint or Annie.
Have Doris charge up 7 grenades.
Get 2 extra lives at the same time.