score:2
Croatia does not require proof of onward travel which matches my own experience. I used an open-jaw ticket to reach Croatia but immigration never asked to see anything more than the passport. A few weeks later I returned to Croatia by car and they did not ask any proof of onward travel. Days later I did go back via train and no return ticket was asked for. So 3 times in and not once did they ask for proof of onward or return travel.