In your “Manage Idols” menu you can pick the center of your idol unit and change it at any time. While your center completes various tasks, she gains XP and can level up to maximum of level 5. These levels are permanent global unlocks and persists through all of your games. Level up all of the “basic” girls of Starnova (Sasami, Mariya, Aki, Mika, Julie, Natsuki and Nemu) to level 5 in order to unlock these achievements. All of the girls are available for hire in the “Free Play” from the start.[

In “Story Mode” you unlock Furuya at the end of the mission 7. And you can level her to level 5 during the same mission.

In “Story Mode” you unlock Kaori at the end of the mission 8, and she becomes hirable during stage 9 where you can level-up her center abilities to level 5.

In “Story Mode” you unlock Mako at the end of the mission 10, and she becomes hirable during mission 11 where you can level-up her center abilities to level 5.

In “Story Mode” you unlock Stella at the end of the mission 13, and she becomes hirable during mission 14 where you can level-up her center abilities to level 5.

In “Story Mode” you unlock Shiro at the end of the mission 18, and she becomes hirable during mission 19 where you can level-up her center abilities to level 5.

To unlock the Treadmill and Kotatsu you need to have Aki as a center and level up her “Dance”, “Looks” and “HP” stats to quite a decent level. You need to use “Dance Studio” room to level-up “Dance” skill and “Cafeteria” to level-up “HP/Looks” (left click on the Cafeteria and you can switch it between modes which level either “HP” or “Looks”).

The easiest way to unlock the gold record is to choose the girl who has the highest Sing/Dance skills and record a song using her and her alone. Choosing better songwriter or recording PV also helps.

Just keep earning money to unlock the “Golden Space Whale”. Once “Golden Space Whale” is unlocked simply buy it (7000 KN) and place it anywhere on the map to unlock the achievement.

In order to unlock the “Sunrider Model” simply keep placing expensive columns around the map. Once “Sunrider Model” is unlocked simply buy it (6000 KN) and place it anywhere on the map to unlock the achievement.

Simply set Mariya as your center and create a song with her as the only one performer which has a rank “SSS”. Song quality depends on the idol’s sing and dance stats. Also having legendary song writer and a beach PV should help boost stats of your song to the max.

To unlock espresso machine, you need to max out Mariya’s purity (get it to 100) while she is your center. Certain jobs increase purity, Sasami’s center ability passively increase purity, filming temple PVs increase purity of idols involved in them, and buying all of your stocks in the “Finances” menu also passively restores purity of all your idols. I also cured her illnesses in the sickbay and lowered her infamy to zero using PR department (you can switch it to the “Damage Control” mode to reduce infamy of all of your idols), but I am not sure if all that is also required or not.

To unlock espresso machine, you need to max out Julie’s purity (get it to 100) while she is your center. Certain jobs increase purity, Sasami’s center ability passively increase purity, filming temple PVs increase purity of idols involved in them, and buying all of your stocks in the “Finances” menu also passively restores purity of all your idols.

To unlock beckoning cat, you need to set Natsuki as your center, pause the game, activate her ultimate where she summons her alpaca and pick a quick job for her to complete (2-3 hours long). Make sure her special doesn’t run out before the job is complete.

To unlock the Punching Bag, you need to set Julie as your center and get her infamy to around 500.

To unlock the Bronze Alpaca, you need to set Natsuki as your center and use her special ability around 10-15 times in a single mission.

In order to unlock the Grandfather Clock, you need to set Furuya as your center and create a song with her as the only one performer which has a rank “SSS”. Song quality depends on the idol’s sing and dance stats. Also having legendary song writer and a beach PV should help boost stats of your song to the max.

To unlock the Golden Buddha, you need to set Furuya as your center, to max out purity of all of your idols and reduce their infamy to zero. Certain jobs increase purity, Sasami’s center ability passively increase purity, filming temple PVs increase purity of idols involved in them, and buying all of your stocks in the “Finances” menu also passively restores purity of all your idols. You can lower infamy of your idols using PR department (you can switch it to the “Damage Control” mode to reduce infamy).

While Kaori is your center, she needs to earn around 20-30k of money from jobs and this unlocks Daruma for purchase.

“Memento” is probably the hardest item to unlock, you need to have a “Legendary” ranked live on the “stadium” (biggest) venue while Nemu is the center of your idol group. It requires you to have a lot of SSS ranked songs and lots of oxygen canisters (build 5-7 research labs to increase your maximum stock).

Both items are Mako-related. While she is set as your center, build huge security department with around 10 security guards working in it in order to unlock the “Drone”. And in order to unlock “Ornamental Katana” you need to catch around 15-20 stalkers in a single mission while Mako is your center. Stalker frequency depends on girl’s popularity (sum of fame and infamy).

In order to unlock the Black Jack statue you need to set Stella as your center and create a song with her as the only one performer which has a rank “SSS”. Song quality depends on the idol’s sing and dance stats. Also having legendary song writer and a beach PV should help boost stats of your song to the max.

To unlock the Roman Fountain, you need to create a very well selling song while Shiro is your center. Level up sing and dance stats of all of your idols as high as possible so that the song has a rank “SSS”. Also having a legendary song writer and filming a beach PV should help boost stats of your song to the max.

Story mode has 20 stages and you need to complete them all in order to unlock this achievement.

Mariya starts as the oldest idol in the Generations mode, so she should be able to hit 30 first. Just make sure to use any tricks which increase purity (buying your stocks, setting Sasami as the center, sending her on jobs to the temple/hospital/voting campaings, filming PVs at the temple) and you’ll get this one easily.

In Generations mode once you retire and idol you can rehire her exact copy which retains all the fame of the original, so this achievement is incredibly easy to get.

If you have any issues defeating Quasar 8 times in the Quasar Battle Mode, simply reduce difficulty of the game in settings – it doesn’t affect your ability to unlock achievements.