You can visit his blog at RooshV. Croatian girls are extremely receptive to day game. They want to be opened. Even if she has headphones and seems focused on her music, it can still go well.
Croatia is one of those places where both indirect and direct game work. Pick one that suits the venue and your personality. If she smiled, I knew I was in. Girls will give you their number even if they have a boyfriend. It may not come out until the first meeting. Not only will this weed out flakey girls, but it gives you an opportunity to find out what she wants in life. You need to push the interaction as far as you can go. Absolutely do not add a Croatian girl to Facebook.
They are accomplished attention whores and will string you along. Cockblocking is a huge problem. The best way to fight it is to be more selective about the venues you choose. Experiment in the city to find something in the middle that has the best balance between beauty and attitude.
So much of a successful Croatian experience will be based on the venue. What I did was approach girls whose friend was already getting hit on by another guy.
Croatian girls already have an elevated perception of themselves and get compliments all the time. They are not insecure as girls from the Baltics or Ukraine. Croatia is slowly embracing one-night stands. With the right logistics, you should be able to get them. They are far easier than a place like Ukraine. The key here is having tight logistics. The girls who are most likely to go for this will be and who want a taste of the American sexual culture.
Older women will be able to resist your logistical game. Similar to the above point, all your dates should be close to your apartment. Even if a Croatian girl is playing aloof, she can turn on a dime once in a private room. The best game for Zagreb, the capital, is to have the best logistics possible.
Sadly, Croatian girls flake more than average so you want the proximity of your apartment to act as bait for casual hangouts that turn into bangs. Get ready to meet some hardcore female players.