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