Borderlands is not my usual type of game but 2 is amazing for co-op play, it is also hilarious and beautifully written. We have put more hours into that than any other game.
Some other great co-op games are - Divinity Original Sin, Portal 2, Diablo 3, It Takes 2 (especially good if you want something fun but easy) Overcooked
Some great lesser known, very unique games that you might not find otherwise - Nine Parchments, Trine series
Borderlands is not my usual type of game but 2 is amazing for co-op play, it is also hilarious and beautifully written. We have put more hours into that than any other game.
Some other great co-op games are - Divinity Original Sin, Portal 2, Diablo 3, It Takes 2 (especially good if you want something fun but easy) Overcooked
Some great lesser known, very unique games that you might not find otherwise - Nine Parchments, Trine series