Adrien's room is massive, containing a total area nearly twice the size compared to Marinette's room. The room is separated into two levels, connected by a white, spiral staircase.
From the pictures and footage available, below are a list of outstanding features:
Various fencing trophies. Most of these flank his computer monitor.
Three fencing banners are also visible--green, purple, and red. The larger, green one is pinned above his king-sized bed.
A rock-climbing station. This is situated on the second story, next to the library. There are five total colors, each likely delineating a specific difficulty level: orange, sky blue, lime green, teal/turquoise, and red.
A basketball half-court.
A yellow and red basketball poster hangs beneath the hoop.
Two wooden skateboard ramps.
A Foosball table.
An arcade station, featuring two retro consoles and a DDR-esque dance-pad.
A large, white couch, capable of seating five people.
The couch faces some manner of entertainment system, visible in the gallery.
Three doors, each marked with yellow and black placards. Each placard details a specific animal. There are two "bear" doors and one "shark" door.
A multi-screen computer system. It is comprised of one primary monitor, three secondary monitors, and an unknown operating system.
Adrien frequently reads about Ladybug on his computer, and visits Alya's Ladyblog.
A brown and red carpet, situated around his computer station.
The carpet has a more modern, abstract pattern.
An enormous library situated on the second floor. The edges of the walkway are bordered by either glass or acrylic.
A big bathroom with a bathtub and a shower head, situated next to the arcade station.