Persona Q: Shadow of the Labyrinth is a Nintendo 3DSSpin-Off of, interestingly, two franchises: Atlus' popular Persona series and Atlus' more recent Etrian Odyssey games. The story is written by members of the Team Persona development group, and features a Cross Over between the casts of Persona 3 and Persona 4. But other aspects, such as gameplay and visual design, are taken from Etrian Odyssey. In fact, most of the production staff is from the Etrian Odyssey team, including director Kazuya Niinou and character artist Yuji Himukai.The story revolves around a mysterious tower that is said to bring death to whoever hears its bell. When the tower appears at both Gekkoukan High School in the past and Yasogami High School in the future, the casts of Persona 3 and Persona 4 team up across time to investigate the tower's labyrinth. Along the way, they meet two brand new characters, Zen and Rei, who are connected to the tower.The game was released in Japan on June 5th, 2014. A Western release is planned for November 25, 2014.
Call Back: Like in Persona 1 and the Persona 2 duology, everyone on the coalition can enter the Velvet Room and, save for Zen and Rei, carry multiple Personas, not just the protagonists. Fuuka and Rise can also carry sub-Personas, which will still gain experience.
While it's also a gameplay mechanic of Etrian Odyssey itself, you can also play with up to five party members, which is true for P1 and both P2 games as well, as opposed to the four member parties of P3 and P4.
Canon Name: Subverted. Regardless of which protagonist you pick (P3 or P4), you have to name both in your file. There are no default names for either the first or second protagonist. Notably, the names what they have been called in the past (Minato Arisato, Makoto Yuuki, Yu Narukami, and Souji Seta) cannot be generated if you let the game select a random name for them (although Sakuya [朔也], the P3 protagonist's first name in The Weird Masquerade, is among the randomly generated names).
Clock Punk: The mysterious tower is filled with fantastical clockwork and gears.
S.E.E.S. have light blue for the Persona 3 protagonist, pink for Yukari, dark blue for Junpei, red for Akihiko, magenta for Mitsuru, green for Fuuka, yellow for Aigis, brown for Koromaru, orange for Ken, and purple for Shinjiro.
The Investigation Team have gray for the Persona 4 protagonist, orange for Yosuke, green for Chie, red for Yukiko, purple for Kanji, pink for Rise, yellow for Teddie, and light blue for Naoto.
Cross Over: The full casts of Persona 3 and Persona 4 end up becoming involved in the mystery of the Labyrinth.
Crutch Character: When Zen and Rei join, they have the highest HP and SP in the party. This is because they're balanced with the Persona-users with Sub-Personas equipped, and Sub Personas aren't unlocked just yet.
OOC Is Serious Business: The usually unflappable Mitsuru screams her head off when she faces the Deadly Doctor Shadows referencing Mitsuru being experimented on by scientists under her Grandfather in the backstory of Persona 3.
Mitsuru: STAY AWAAAAYY!!
Original Generation: Despite most of the cast being from Persona 3 and Persona 4, Zen and Rei are brand new character who debuted in Q.
Red Oni, Blue Oni: The protagonists have a bit of this going on. They're both the calm, collectedleader-types; but the P4 hero has more assertive body language and is quite obviously "The Boss" of his crew, while the P3 hero leans more towards being The Quiet One and acts as the "pillar" of his team rather than leader. Judging by the trailers they get along quite well.
Stealth Pun: That "Q" letter in the title is shorthand for meikyuu (迷宮), meaning labyrinth, in reference to how Sekaiju no Meikyuu, the Japanese title of the Etrian Odyssey series, is abbreviated as SQ. It also sounds similar to "cute" to reflect the characters' appearances.
Suddenly Voiced: The Persona 3 protagonist, who had no spoken lines in that game.
Super-Deformed: The entire cast appears as smaller, cuter versions of their regular appearances from Persona 3 and Persona 4.
Time Travel: The tower allows the cast of Persona 3 from 2009 and the cast of Persona 4 from 2 years later to meet and team up. Which is why the P3 hero and Shinjiro are still alive.