The Chaos Spear is a Chaos Power and Shadow the Hedgehog's signature move. It is a lightning arrow-head-shaped bolt that is made of Chaos Energy.
In Sonic Adventure 2 and its remake, during the final battle between Sonic and Shadow, if the opponent is Shadow, then he will launch the Chaos Spear at Sonic if Sonic is too far behind on the runway. Also, in the multiplayer "Race Mode", after Shadow gets 40 rings, he can use the Chaos Spear to impede his opponent.
In Shadow the Hedgehog, the Chaos Spear can only be used in the final boss battle, Devil Doom. Super Shadow can launch multiple Chaos Spear like missiles very quickly to cause minor injuries on Devil Doom, and can charge the attack to make it more powerful.
In Sonic the Hedgehog, by pressing A, X (Xbox 360), or X, Square (PS3), Shadow can shoot a Chaos Spear. The technique can be upgraded when Shadow launches the Chaos Boost to Level 2, called Chaos Lance which can cause explosive damage. Chaos Lance appears in the final battle as well. Mephiles also uses a "Dark Chaos Lance" to kill Sonic.
In Sonic Chronicles: The Dark Brotherhood, it is the same as the one in Sonic the Hedgehog, as a mini-lightning bolt. It scatters several spears at Shadow's opponents.
In Sonic and the Black Knight, Sir Lancelot (who is a counterpart of Shadow), with his swords Aduro Cutlass, Aduro Khopesh, Precieuse, Espadon, and Ddraig Goch, can launch mini arrows of energy that resemble a Chaos Spear by swinging the sword. Also, when fighting Sir Lancelot as a boss character, he will fire several of these arrows when he gets too far away.
In Sonic Generations, Shadow uses Chaos Spear several times in the Final Rush race/battle against Sonic. Shadow performs Chaos Spear when Sonic falls too far behind, Shadow also performs Chaos Spear during his special attack after gaining two Power Cores, Shadow launches several Chaos Spears onto the ground that Sonic must avoid by using Quick Step, afterwards Shadow perform a much larger, stronger, purple Chaos Spear directly at Sonic.
- Chaos Spear has changed over the years. First it was a yellow lightning arrow that damages in Sonic Adventure 2, then in Shadow the Hedgehog, it was a light blue oval that damages, and in Sonic the Hedgehog it was a white/blue bolt of electricity that stuns. In Sonic Universe, it was a green lightning bolt-like spear. In Sonic Chronicles: The Dark Brotherhood, when you used Chaos Spear, they looked like purple lightning spears. Finally, in Sonic and the Black Knight, it was a small red arrow that damages.
- In Shadow the Hedgehog, the Chaos Spear can be only launched when Shadow is in his Super Form but it can be charged for greater power.
- In Sonic Adventure 2 and Sonic Adventure 2: Battle, Shadow announces the Chaos Spear by shouting "Disappear!"
- In Sonic Generations, Shadow will shout out "Chaos Control!" when when using the powered up Chaos Spear because he uses Chaos Control to supercharge it.