"To abandon the project" means to give up or quit the project, and no longer continue with it.
Sentences with «to abandon the project»
The developer, however, isn't abandoning the project anytime soon, at least not entirely. (techtimes.com)
Before taking part I had spent almost 4 years trying to make games in my spare time and only had a couple of abandoned projects to show for it. (erraticgamer.com)
So what we do is abandon the project altogether. (nakedpastor.com)