How many game systems does Steven own?

Question

In episode 3 of Steven Universe, Steven is shown to have a system resembling a Nintendo 64 in his room. In later episodes, he's also been shown to have a Nintendo GameCube.

Has Steven been shown to own any other video game consoles? If so, which ones does he own?

Steven M. Vascellaro · Accepted Answer · 2019-01-25 16:12:03Z

Steven has been shown to have 3 systems; a Nintendo 64, GameCube, and Game Boy.

Nintendo 64

Appears in Cheeseburger Backpack (S1 Ep3), Rose's Room (S1 Ep19), Gem Drill (S3 Ep2) and Mr. Greg (S3 Ep8).
Games: Golf Quest Mini (Parody of various RPGs)

Appears in House Guest (S1 Ep27), Lion 3: Straight to Video (S1 Ep35), Open Book (S1 Ep46), Say Uncle (S2 Ep3), Steven vs. Amethyst (S3 Ep19), and Steven Reacts (iTunes)
Referred to as "Dolphin" in Steven vs. Amethyst as a reference to the GameCube's development codename.
The online short Steven Reacts shows the games "Steel Cog", "Pikemen 2", "Star Battlers: Team Leader", "Lue's Estate", "Smash Pals Scuffle", and "Forever Darkness" on a shelf behind Steven
- Referencing Metal Gear Solid: Twin Snakes, Pikmin 2, Star Wars Rogue Leader, Luigi's Mansion, Super Smash Bros. Melee, and Eternal Darkness: Sanity's Requiem respectively
Games resembling Animal Crossing and The Legend of Zelda: Wind Waker can be seen on the floor of Steven's Room in Open Book (S1 Ep46)

for a moment there i though Dolphin was a reference to the Emulator but it's probably more likely the Emulator is named after the development codename — Memor-X, Jun 16 '17 at 1:49
@Memor-X As a past developer for Dolphin, I can confirm that yes, Nintendo's codename came first. :P — Steven M. Vascellaro, Jun 16 '17 at 1:51
How do you know the Game Boy is Steven's? Maybe one of the Crystal Gems sneaks into the bathroom to play on it. :-) — svick, Jun 16 '17 at 13:34