The Blackwell Bundle is on sale for 33% off at GOG. It’s actually 4 games in one so GOG calls it a bundle.
Blackwell Bundle includes all four episodes: Legacy, Unbound, Convergence, and Deception.
Blackwell Bundle = $9.99 ($14.99)
Some of these games were in the Xmas Indie Royale Bundle but that was for the Trilogy of games. This is for four games.