When Nocturne and the Echidnas of the Nocturnus Tribe were taken into the Twilight Cage, they all heard a voice in their heads say something like "Argus". Pir 'Oth Ix came to calling this event the Argus Event.
Nestor the Wise later theorized, based on information from the Precursor Tablets, that Argus may have been the entity responsible for bringing not only the Nocturnus to the Twilight Cage, but also the other resident groups: the Voxai, the Kron, the Zoah, and the N'rrgal.
|Sonic Chronicles: The Dark Brotherhood|
|Playable characters||Sonic | Tails | Amy | Knuckles | Rouge | Big and Froggy | Cream and Cheese | Eggman | Shadow | Omega | Shade | Super Sonic|
|Other characters||G.U.N. | Commander | Nocturnus Clan | Ix | Nestor | Super Ix | Gizoids | Emerl | Scylla | Charyb | Knuckles Clan | Egg Bot | Swatbot | Krag | Syrax | Raxos | Haniman | Queen N'rrgal | Thebes | Thelxe | Overmind | Twilight Cage Pirates | Precursors | Chao | Argus | Vector|
|Places||Green Hill Zone | Central City | Blue Ridge Zone | Mystic Ruins | Angel Island | Metropolis | Metropolis Ground Zero | Kron Colony | Twilight Cage | Zoah Colony | N'rrgal Colony | Voxai Colony Alpha | Voxai Colony Beta | Nocturne|
|Other||Dexter | Argus event | Sequel | Archie Prequel|