Light Novel Volume 20

Heavy Object: Doomsday (Part 2) (へヴィーオブジェクト　人が人を滅ぼす日（下）) is the twentieth and final volume of the Heavy Object light novel series, released on October 8, 2021.

Chapter List

 * Prologue
 * Chapter 4: Thus Spoke the End >> *No Mission Name Set Due to Confusion in the Chain of Command
 * Chapter 5: From the Land of the Rising Sun >> Unofficial Island Nation Landing Operation
 * Chapter 6: –––––––Determination––––––– >> Mission to Rescue the Entire Earth
 * Epilogue