I did 2 semesters of Physics during my undergrad covering Newtonian mechanics, thermodynamics, electromagnetism, wave/acoustics, optics, and basic relativity. I got a minimum of A on all those classes. I also took Calculus, Linear Algebra, and Differential Equations and got good grades on those. However I believe these won't weigh heavily enough to get through admissions; I'm already at a huge disadvantage competing with people whose majors lie in the Physical sciences.
I'm planning grad school somewhere in Europe–likely in Germany–due to much lower tuition fees. I'm from a developing Asian country working in a multi-national company on another Asian country. Skimming through the thread from Choppy's reply, it seems I can further strengthen my position by taking additional Physics coursework. Are there schools in Europe where I can enroll for extra Physics credit? Bonus if I can earn "Europe-recognized" Physics credit from outside Europe or even online. I'm reluctant to take a BS degree again because it will take a lot of time.