Jan Haller is a Master's student in Electrical Engineering and Information Technology. In his free time, he occasionally develops games in C++. He is also interested in the creation of graphics and 3D models.In 2008, Jan stumbled upon SFML. Since then, he has used the library for a lot of his work. One of his bigger projects was a 2D jump'n'run game, where the character has to find its way through different levels, defeating enemies and collecting various items. During the years, Jan has actively participated in the SFML community, getting a lot of insights into the development of SFML 2. He has also written a C++ library called Thor, which extends SFML with ready-to-use features like particle systems or animations. Henrik Vogelius Hansson has always been in love with both games and programming. He started his education fairly early and continued on into the indie scene with Defrost Games and their game Project Temporality. He then moved on to the Paradox Development Studio, where he got to work on titles like Crusader Kings 2.Beside the game companies, Henrik has also been very active in the SFML community and even provided a binding for Ruby called rbSFML. Artur Moreira is an enthusiast game developer who aims ultimately to found a new game development company in his home country. He has been programming games and game-related software for over 4 years. Most of the effort in that time was put in creating an open-source game making library with lots of flexibility and portability called Nephilim, which supports all major desktop and mobile operating systems, making game development fully cross-platform and fast. Alongside with this big project, he makes his own prototypes and games for educational and commercial purposes.Aside from the programming, he also puts some focus in creative areas such as 3D modeling, digital painting and music composing