->''"Striking from the shadows, a ruthless organization named COBRA has returned to unleash an endless army of robotic troops and massive machines on the world. Our only hope, a group of highly skilled young operatives thrown together to save the planet. With time running out, they must become the super secret team known only as Sigma 6."''

Initially a Creator/{{Hasbro}} toyline re-imagining characters from [[WesternAnimation/GIJoeARealAmericanHero one of the company's popular 1980s franchises]], ''GI Joe Sigma 6'' is also an animated series (2005-2007), produced by the Japanese animation studio Creator/{{GONZO}}. Ironically, this description fits another series (''Anime/TransformersCybertron'') to a T.

A continuation (sort) of the two direct-to-video ''GI Joe'' CGI movies, ''Spy Troops'' and ''Valor vs. Venom'', Sigma 6 has Cobra Commander broken out from prison and the Joes forced to evacuate their base. Traveling in their mobile command center, the R.O.C.C. and equipped with Hi-Tech's [[PoweredArmor Sigma suits]], the Joes renew their battle to protect the world from Cobra.

The show ran for two full seasons on [[Creator/FourKidsEntertainment 4Kids TV]], and is later re-aired on The Hub before it was rebranded as Creator/DiscoveryFamily.


* AdaptationDistillation: The series draws from the original mythos, along with bits and pieces of other, more recent works.
* AdaptationalBadass: The Cobra Commander of this continuity is played much more seriously and is a far cry from the whiny and inept clown he was in ''WesternAnimation/GIJoeARealAmericanHero''.
* {{Animesque}}: Inverted, it's a genuine anime based on a American toyline.
* AscendedExtra: High Tech used to be one of the less important Joes. Here, he often outpaces Duke and most of the other Joes in screen time. It helps that pretty much everyone is using a lot of super technology (more so than usual, anyway) and this gives him a lot of chances to flaunt his specialty. Destro specifically considers High Tech his "Sigma 6 Counterpart", giving him one of the show's primary rivalries.
* BloodlessCarnage: Nobody bleeds.
* BroadStrokes: The series is suggested to take place after the direct-to-video CGI films by Reel FX (for instance, Cobra Commander being imprisoned in the beginning of the series and General Hawk recovering from an incident that altered his DNA seems to reference the events of ''Valor vs. Venom'', where Hawk was mutated by Cobra into a power-hungry behemoth named Venomous Maximus and Cobra Commander was captured in the end), but the Joes and Cobra members have noticeably different appearances and characterizations.
* ByTheBookCop: Heavy Duty refers to Scarlett as such.
* ClipShow: The episode "Awards" shows clips from previous episodes. Even the framing devices are edited together from footage of previous episodes.
* ConspicuousCG: It's a trademark of GONZO after all.
* ContinuityReboot: While implied to take place after the direct-to-video films ''Spy Troops'' and ''Valor vs. Venom'', [[BroadStrokes at least in some capacity]], the series for the most part comes off as being a completely new continuity.
* ContinuitySnarl: The first season established the series as a sequel to the CGI G.I. Joe specials (Spy Troops and Valor vs. Venom) produced by Reel FX. The biggest evidence of this is the fact that General Hawk is still in the hospital recovering from the "Venomization" process he suffered during the events of Valor vs. Venom. However, a later CompilationMovie of the first five episodes (called "First Strike") added a scene that established that the Joe team from Sigma 6 were not the same Joes from the CGI specials, but new members who inherited the codenames of their predecessors 20 years after the original members retired. Somehow, most of the Cobras also got identical successors as well and they managed to get a new Storm Shadow who just happens to be the rival of the new Snake-Eyes.
* CoolCar: Lot's and lot's and... did I mention there are a lot?
* CoolVersusAwesome: Snake Eyes vs Storm Shadow, or maybe it's the other way around.
* DoNotAdjustYourSet: Cobra Commander does this in the show's final episodes.
* FamilyFriendlyFirearms: Not really shocking, it's G.I. Joe.
** Though Buzzer's "Laser Chainsaw" is really pushing it.
* FamilyUnfriendlyViolence: Cobra is nowhere near as ineffective as he was in the past. In fact, he's down right creepy sometimes.
* FiveEpisodePilot: The series began with a five-part episode.
* GottaCatchEmAll: The energy rocks called "Power Stones" that Sigma 6 and Cobra end up fighting over.
* GrandFinale: The two-part episode "Ice"[=/=]"Assault", which ended with every member of Cobra except for Cobra Commander and Firefly captured.
* ImmuneToBullets: Much of Cobra's tech can't be shot down.
* InstantAwesomeJustAddMecha: Both Cobra and the Sigma team jump on the Mecha-bandwagon.
* KarmaHoudini: Cobra Commander and Firefly end up escaping in the finale "Assault", while the other Cobra members are captured.
* MechaMooks: The B.A.T.s are Cobra's robotic soldiers.
* NeverSayDie: Played straight. When warned about the dangers of taking the wrong path, Tunnel Rat is only told that he could get hurt.
* OhCrap: Poor Spud really screwed things up with his [[PlayfulHacker playful hacking]].
* PineappleSurprise: In ''Valor vs Venom'', Snake Eyes pulls the pins on every grenade on Storm Shadow's bandolier to escape him. Storm Shadow survives by tossing the belt before it's too late.
* PolarBearsAndPenguins: Actually manages to get this one correct. When the Terrordrome Project is activated, the scenes of the two devices in the north and south poles have quick shot of polar bears in the north and a penguin in the south, as it should be.
* PoweredArmor: The Sigma suits enable the Joes to fare better against Cobra's forces.
* ThemeTuneRollCall: The Joes are introduced by name in the theme song.
* TheVoiceless: Snake-Eyes, as always, is silent.
* ThisIsTheFinalBattle: In the episode "Duel", Cobra Commander says to Duke that it will be their last battle when they're about to fight in the Cobra Coliseum.
* TookALevelInBadass: Cobra Commander, this time around. He now resembles more of a dictator than a coward!
* UrineTrouble: In the fifth episode, Scott Abernathy's robotic dog Spud shorts out the power core to Cobra's giant laser cannon by "peeing" hydraulic fluid on it.