Retcons are an in-universe way to explain a paradox that has occurred via time travel. Retcons mainly occur when a character has changed something in the past, either by moving an object or simply by interacting with those around them. When a paradox occurs, it has ripple effects down the relative time line, until it reaches the travellers PTP.
Out of universe, a Retcon is a section of the comic that when revisited, shows a different image or text. This effect is done using cookies on your browser. [cn] Some Retcons are miniscule, while others are noticeable immediately.
There has been one occurrence of a meta-retcon, in which the author Zack has stated that some pages were to be considered non-canon. This decision took several days to make, and was very hard for him.[1]
Internal Retcon[]
An internal retcon is a change in the continuity of the story that arises due to forces within the story itself, often as a result of a specific type of time travel.
There may be some retcons missing from this list.
What Kind of Maggot Grows in the Corpse of a Day?[]
The retcon is initiated on page 97 and covers page 66 to page 67.
Portal through wall[]
The retcon is initiated on page 681 and covers page 124.
Office Shovel Murder[]
The retcon is initiated on page 167 and covers page 139 to page 156.
The Castillo/Edwards swap[]
The retcon is initiated on page 1300 and intermittently covers page 1246 to page 1262.
Corruption[]
The retcon is initiated on page 2273 and covers most of Chapters 1 and 2 (pages 1 to 107). A second retcon is triggered on page 2277, covering most of Chapter 3 (up to page 194).
External Retcon[]
An external retcon is a change in the story that Zach makes to prevent the story from ending. Since All Night Laundry is an interactive webcomic, there is a chance that the users create untenable situations.
B13's Death[]
The retcon started on page 468 the events leading to the retcon started on page 427