If it follows suit to the pattern that's been going on with Bard's Tale lately, it will be a release w/ the 2004 game, and the original 3 (non-related to the 2004 game) releases as extras.
In the past year I've seen Bard's Tale offer the above deal on Steam, and even on ANDROID. The sales for the set have seemed to skyrocket and reignite people's attention towards the game and it's humor, enjoyable story, humor, fun gameplay and humor.
I recently got it on Steam for 2.50 as well, though I'd rather own it on GOG. It's one of the only games I bought on multiple consoles. :)