Finish the first day of any route.

LOL SPOILERS *MUTE DIES

Finish your mission by arriving on Earth.

Finish the game with your cute AI wife and/or completely platonic friend *Hyun-ae!

Finish the game with the security AI in traditional dress, *Mute!

Finish the game with your completely impossible AI harem!

Start *Mute's route and finish, as both a man and a woman.

Take an actual honest-to-god IRL photograph of the cake you're sharing with *Hyun-ae, and e-mail it to the developer! cake@hateplus.com (UPDATE FOR 2018: this achievement is now on the honour system! If you type 12101989 and then 0 on the title screen, that should unlock it. Just promise you won’t cheat!)

Read every log file again with *Mute on day three.

Complete all three routes over the span of nine real days without skipping, LIKE YOU'RE SUPPOSED TO, GEEZE.