Lelouch finally confronts the Emperor after a long, arduos rebellion. After many years, he finally confronts the Brittanian Empire in a decisive battle. His army lies in ruins, all his friends are dead, and his top general Kallen sacrafices herself to destory the last of the KoR guarding the Emperor.Tearfully, he promises to end the suffering of the world by dethroning the Emperor.
As they Lelouch confronts the Emperor's Arturia nuke powered supermech in the Shinkiro MKII, he realises that they only way they will ever end this battle is to cancel out the shielding of both mechs by ramming the Absolute Protection territory of the Shinkiro into Charles' mech, caceling out both shields, and firing his main laser point blank at the cockpit. Realising this would kill both of them, he reflects back on his actions. He sees how he had to kill his most loved siblings and even his best friend to get revenge on this man. Knowing that Nunally would never forgive him if she found out, he snaps. He crashes the Shinkiro into Charles and fires.
A huge explosion rocks the Imperial Palace, as the mech goes critical and the nuclear power source overloads. In the middle of a huge smoking crater, there is nothing but silence. Then...
We see Lelouch crying, with a geass sigil on his forhead.