The key to successful salary negotiation for people who are freshly starting in an area is having alternatives. The practical problem you face is asymmetry of information - the company is in a far better position to know what they pay lot of other people, and they are also likely to have inside information on what other companies pay their people as well. This is not something most people can overcome directly - you would need insider information, which you presumably don't have access to (or realize you have access to).
Instead, the way to learn what you can get is to get actual offers. If you only get one offer, well, that's what you were able to get. If you need a job ASAP and can't afford to play the waiting game to see what you can get over multiple months, or you just don't want to do that, you will rely on randomness based on market conditions to set your offer.
There is no salary game that has proven to be more effective than being able to say "that's too low", and mean it. Every other tactic is playing around the edges. You can ask if they would consider going higher, given your previous experience, and maybe they'll bump you up a little. But you have no way of knowing just how flexible they are willing or able to be in your offer, because you don't have access to that information. You don't know what the other applicants are like, you don't know what the policy of the company is, you don't know what the real current market conditions are, you don't know how hard it is to find another person with your skills - you are mostly flying blind.
In practice, the largest variability in salary you can tap into as a job applicant is between businesses and job titles, not within a single offer, especially as someone with limited professional experience. Thus the goal is to apply broadly to positions where you have some reasonable fit, and to not be in a rush. Since most new graduates are in a rush, the optimal strategy becomes applying as well as you can in a short period of time, taking the best offer with only minor negotiation tactic (ask, try to use multiple offers if you get them), and then after a reasonable period of time (which varies by industry and region - 6 months to 2 years is close to the world-wide range) apply for other jobs.
Since you'll already have a job and relevant experience, and ideally good references, a potentially better understanding of the market (if you stay active beyond just doing the minimum to get the job done), and a proven ability to hold relevant employment, you'll have a lot more to gain than any gimmick can get you now.
So: apply hard, do your best to get multiple offers, try to pick the one that seems like the best opportunity, softly ask for more and see what they say, walk away if you have good reason to think you can do better and have the financial flexibility to do so, and then set yourself up for greater success on the next round where you will try to have more time, more flexibility, and more negotiating room.
