ScummVM is a collection of Virtual Machines for playing classic graphical 2D point-and-click adventure games on modern hardware. For the first year, ScummVM also accepts students willing to work on ResidualVM, its sister project for 3D games. Supported games include favorites such as Monkey Island, Simon the Sorcerer, Space Quest, and many more. To this end, the Virtual Machines (called Engines) are complete reimplementations in C++ of the engines used in the original games. The development team works either by reverse engineering game executables (usually with the permission of creators of the game), or by using the original source code of the games provided by the creators. The number of engines is constantly growing thanks to a very agile and diversified development team and ScummVM is able to run more than 200 games. The VM approach followed by ScummVM and ResidualVM results in efficient code, which has been ported to numerous Operating Systems. Besides both running on all mainstream desktop environments, namely Windows, Mac OS X and most Unix variants (Linux, *BSD, Solaris), ScummVM also runs on popular game consoles (Wii, Nintendo DS, PlayStation 2, PlayStation Portable, Dingoo and more), smart phones and PDAs (Android, WinCE, iPhone or Symbian based), and even on many not-so-mainstream systems (like BeOS, AmigaOS or OS/2). ScummVM has a highly productive team of about 51 currently active developers (out of an all-time pool of over 110), working together on a codebase of 2,100,000 lines of code. In addition ScummVM has many non-developer contributors, and a huge and highly active community. ScummVM is among the top ranking projects hosted on sourceforge.net with over 100,000 monthly downloads and ~10 million project web hits per month.