Here is the full list of all 46 Bullet Girls Phantasia achievements.
Erased all achievements.
Clear Chapter One.
Clear Chapter Two.
Clear Chapter Three.
Clear Chapter Four.
Clear Chapter Five.
Clear Chapter Six.
Clear Chapter Seven.
Clear Chapter Eight.
Clear Chapter Nine.
Clear all Extra Missions.
Clear Merrina's Side.
Clear Silvia's Side.
Clear Sarria's Side.
Clear Hardina's Side.
Clear Faren's Side.
Clear Ladoria's Side.
Clear all missions on Hard Difficulty or higher.
Clear all missions on Ecstasy Difficulty.
Clear all missions with an S rank or higher.
Clear all missions on Ecstasy Difficulty with an S rank or higher.
Raise Aya Hinomoto to Level 99.
Raise Yurina Kanezono to Level 99.
Raise Remi Kishino to Level 99.
Raise Tsukiyo Takanashi to Level 99.
Raise Saki Amamine to Level 99.
Raise Minagi Kamishiro to Level 99.
Raise Aki Saotome to Level 99.
Raise Mai Doiuchi to Level 99.
Raise Silvia Hortensie to Level 99.
Raise Sarria Violette to Level 99.
Raise Hardina Crescent to Level 99.
Raise Faren Sealwinde to Level 99.
Raise Merrina Iris to Level 99.
Raise Ladoria Sealwinde to Level 99.
Obtain all underwear.
Obtain all weapons.
Obtain all materials.
Defeat 1000 monsters.
Defeat 10,000 monsters.
Activate Kukkoro Mode.
Reach a combo of 50 during Intensive Drilling.
Achieve an SSS rank during a Single Drilling.
Achieve an SSS rank during a Double Drilling.
Achieve an SSS rank during a Reverse Drilling.
Unlock all abilities for every character.