Rise of the Robots 2021 Event

 is the 2nd multi-event of 2021 and the 14th multi-event overall. It was released on April 7, 2021, and ended on May 12, 2021. Similar to previous multi-events, it was divided into 4 acts:


 * Act 1: April 7, 2021 - May 12, 2021
 * Act 2: April 16, 2021 - May 12, 2021
 * Act 3: April 25, 2021 - May 12, 2021
 * Act 4: May 4, 2021 - May 12, 2021

"Apparently playing robotic god has its consequences? Who knew! When Bart and Professor Frink take things too far to win a Robot Rumble, they also open up Springfield to a robo-uprising. Perhaps building that Icarius-Bot to fly too close to the sun WAS a bad idea? Now it's humans vs. robots in the ultimate blood bath (or oil bath). Will the humans be smart, er, LUCKY, enough to stop these mechanical monsters? Play today to find out."

- event's description.

Trivia

 * Most of the event's content is from Season 15, Episode 9 "I, (Annoyed Grunt)-Bot" and Season 20, Episode 4 "Treehouse of Horror XIX" segment "Untitled Robot Parody".