Project Hel, a DLC for Ghostrunner. The base game was already pretty great, but the DLC added jump trajectories, making movement less ambiguous and improved the frankly wonky upgrade system of the original. It also added a new (albeit shorter) story, a new rage mechanic and you get to play as a cold, unfeeling cybernetic abomination controlled by the villain of the base game.
All of this is to say that I was floored on how much I preferred playing the DLC than the original and I loved Ghostrunner.
The Bird.
Surprised nobody mentioned this, considering the community.