Accomplish the indicated achievement to get the corresponding number of Gamerscore points:

Alice and Evanzuman (30 points): Watch and eliminate the Type-A ending.
Clear Stage 1 on X-Mode (5 points): Clear and eliminate stage 1 on X-Mode.
Clear Stage 2 on X-Mode (10 points): Clear and eliminate stage 2 on X-Mode.
Clear Stage 3 on X-Mode (15 points): Clear and eliminate stage 3 on X-Mode.
Clear Stage 4 on X-Mode (20 points): Clear and eliminate stage 4 on X-Mode.
Clear Stage 5 on X-Mode (25 points): Clear and eliminate stage 5 on X-Mode.
Defeat Black Draft (5 points): Defeat and eliminate the mid-boss in the fourth stage.
Defeat Bullfrog (10 points): Defeat and eliminate the boss in the first stage.
Defeat Cinderella Amber (40 points): Defeat and eliminate the boss in the fourth stage.
Defeat Evaccania (50 points): Defeat and eliminate the boss in the fifth stage.
Defeat Evaccania DOOM (120 points): Defeat and eliminate the true boss.
Defeat Gem & Ini (5 points): Defeat and eliminate the mid-boss in the second stage.
Defeat Jamadhar (30 points): Defeat and eliminate the boss in the third stage.
Defeat Seahorse (5 points): Defeat and eliminate the mid-boss in the first stage.
Defeat Sphinx (20 points): Defeat and eliminate the boss in the second stage.
Defeat Trafalgar (5 points): Defeat and eliminate the mid-boss in the fifth stage.
Defeat Vinogradov (5 points): Defeat and eliminate the mid-boss in the third stage.
Steel and Yuuma (30 points): Watch and eliminate the Type-B ending.