The Shadbase comic pack you're referring to appears to be a collection of comics created by Shadbase, a popular webcomic artist. The last update you mentioned, dated March 28, 2015, suggests that the pack might be an archive of comics up to that point.
: By this time, the artist had transitioned from simple parody art to long-form, transgressive "edgelord" comics that defined his brand of shock humor. The Context of the Legend A Time Capsule shadbase comic pack last update 2872015 al best
For followers of internet subcultures in the mid-2010s, the "Shadbase Comic Pack" was a staple digital compilation. Here is a look at what this specific 2015 version represented in the context of internet art history: A Snapshot of an Era The Shadbase comic pack you're referring to appears