Game book in English (#5528)

* Add Android course (Java)

* Add Android italian course

* Fix blank space error

* Added books in 'Game Development' category

* Fix

* Fix

* Fix link

Thanks to @davorpa

Co-authored-by: David Ordás <davorpatech@gmail.com>

Co-authored-by: David Ordás <davorpatech@gmail.com>

books/free-programming-books.md

@@ -124,6 +124,7 @@
   * [Containers](#containers)
   * [Database](#database)
   * [Datamining](#datamining)
+  * [Game Development](#game-development)
   * [Information Retrieval](#information-retrieval)
   * [Licensing](#licensing)
   * [Machine Learning](#machine-learning)
@@ -467,6 +468,17 @@
 * [Theory and Applications for Advanced Text Mining](http://www.intechopen.com/books/theory-and-applications-for-advanced-text-mining)
 
 
+#### Game Development
+
+* [2D Game Development: From Zero To Hero](https://github.com/Penaz91/2DGD_F0TH) (:construction: *in process*)
+* [Coding With Minecraft](https://turtleappstore.com/book/) - Al Sweigart
+* [Designing Virtual Worlds](https://mud.co.uk/richard/DesigningVirtualWorlds.pdf) - Richard A. Bartle (PDF)
+* [Game AI Pro](http://www.gameaipro.com) - Steve Rabin
+* [Game Design with AGS](https://ensadi.github.io/AGSBook/) - Dave Ensminger, A. G. Madi
+* [Game Programming Patterns](http://gameprogrammingpatterns.com) - Bob Nystrom
+* [Procedural Content Generation in Games](http://pcgbook.com) - Noor Shaker, Julian Togelius, Mark Nelson
+
+
 #### Information Retrieval
 
 * [Information Retrieval: A Survey](http://www.csee.umbc.edu/csee/research/cadip/readings/IR.report.120600.book.pdf) (PDF)
@@ -652,14 +664,12 @@
 * [10 Keys to Great Landing Pages](https://ithemes.com/wp-content/uploads/downloads/2012/09/10-keys-to-great-landing-pages-eBook.pdf) - iThemes Media (PDF)
 * [2016 European Software Development Salary Survey](https://www.oreilly.com/radar/2016-european-software-development-salary-survey/)
 * [2016 Software Development Salary Survey](https://www.oreilly.com/radar/2016-software-development-salary-survey-report/)
-* [2D Game Development: From Zero To Hero](https://github.com/Penaz91/2DGD_F0TH) (:construction: *in process*)
 * [97 Things Every Programmer Should Know - Extended](https://leanpub.com/97-Things-Every-Programmer-Should-Know-Extended) *(Leanpub account or valid email requested)*
 * [A MACHINE MADE THIS BOOK ten sketches of computer science](http://ocaml-book.com/s/popbook.pdf) - JOHN WHITINGTON (PDF)
 * [Ansible Up & Running (first three chapters)](https://www.ansible.com/ebooks) *(account required)*
 * [Asterisk™: The Definitive Guide](http://solmu.org/pub/help/Asterisk/3nd_Edition_for_Asterisk_1.8)
 * [Barcode Overview](http://www.tec-it.com/download/PDF/Barcode_Reference_EN.pdf) (PDF)
 * [Bitcoin and Cryptocurrency Technologies](https://d28rh4a8wq0iu5.cloudfront.net/bitcointech/readings/princeton_bitcoin_book.pdf) - Arvind Narayanan, Joseph Bonneau, Edward Felten, Andrew Miller, Steven Goldfeder (PDF)
-* [Coding With Minecraft](https://turtleappstore.com/book/) - Al Sweigart
 * [Come, Let's Play: Scenario-Based Programming Using Live Sequence Charts](http://www.wisdom.weizmann.ac.il/~playbook/)
 * [Communicating Sequential Processes](http://www.usingcsp.com/cspbook.pdf) - Tony Hoare (PDF)
 * [Confessions of an Unintentional CTO: Lessons in Growing a Web App](http://www.jackkinsella.ie/books/confessions_of_an_unintentional_cto) - Jack Kinsella
@@ -674,9 +684,6 @@
 * ["DYNAMIC LINKED LIBRARIES": Paradigms of the GPL license in contemporary software](http://www.lulu.com/shop/http://www.lulu.com/shop/luis-enr%C3%ADquez-a/dynamic-linked-libraries-paradigms-of-the-gpl-license-in-contemporary-software/ebook/product-21419788.html) - Luis A. Enríquez
 * [Essential Image Optimization](https://images.guide) - Addy Osmani
 * [Foundations of Programming](http://openmymind.net/FoundationsOfProgramming.pdf) (PDF)
-* [Game AI Pro](http://www.gameaipro.com) - Steve Rabin
-* [Game Design with AGS](https://ensadi.github.io/AGSBook/) - Dave Ensminger, A. G. Madi
-* [Game Programming Patterns](http://gameprogrammingpatterns.com) - Bob Nystrom
 * [Getting Real](https://basecamp.com/books/getting-real) - Basecamp, 37signals ([HTML](https://basecamp.com/gettingreal), [PDF](https://basecamp.com/gettingreal/getting-real.pdf))
 * [Google Maps API Succinctly](https://www.syncfusion.com/ebooks/google_maps_api_succinctly) - Mark Lewin
 * [Hacknot: Essays on Software Development](http://www.lulu.com/shop/ed-johnson/hacknot-essays-on-software-development/ebook/product-17544641.html) - Ed Johnson
@@ -709,7 +716,6 @@
 * [PNG: The Definitive Guide](http://www.libpng.org/pub/png/book/)
 * [Pointers And Memory](http://cslibrary.stanford.edu/102/PointersAndMemory.pdf) (PDF)
 * [Principles of Computer System Design](http://ocw.mit.edu/resources/res-6-004-principles-of-computer-system-design-an-introduction-spring-2009/online-textbook/part_ii_open_5_0.pdf) (PDF)
-* [Procedural Content Generation in Games](http://pcgbook.com) - Noor Shaker, Julian Togelius, Mark Nelson
 * [Programming with Unicode](http://unicodebook.readthedocs.org)
 * [Real-World Maintainable Software](https://www.oreilly.com/ideas/real-world-maintainable-software) - Abraham Marin-Perez
 * [Record-Playback Test Automation: Sahi & Selenium IDE: Critical Evaluation of Record-Playback Automation Tools](https://leanpub.com/manualToAutomatedWithSeleniumIDEAndSahi) - Shashikant Jagtap  *(Leanpub account or valid email requested)*