come across

To change sides; to cross over to work for the opposition.

“You argued well in court but your firm doesn't pay its lawyers well, so why don't you come across to ours?”

To give an appearance or impression; to project a certain image.

“A business suit and briefcase help her to come across as the competent professional she is.”

To find, usually by accident.

“In the meadow he came across a rare flower.”

To produce what was desired; come up with the goods.