Scenarios

If you have developed a scenario, we very much like to encourage you to share it with everyone else by sending it to us.

Standard scenarios (included with greenfoot)

ants	By Michael Kölling screenshot	This scenario shows ant colonies looking for food. Ants lay a trail of pheromones to lead other ants to the food. This is a pretty complete scenarion, demonstrating many different ways to generate graphics, as well as nice emergent behaviour.
wombats	By Michael Kölling screenshot	The 'wombats' and 'wombats2' scenarios were written as a sample for the greenfoot tutorial. It doesn't do very much - wombats walk around and eat some leaves (if they're lucky). The tutorial takes you through some activities with this scenario to familiarise users with the greenfoot world.
lunar lander	By Poul Henriksen screenshot	This is a (fairly simple) implementation of the old Lunar Lander favourite. This example is used to demonstrate dealing with key input (you fire the rocket engine by pressing the 'arrow down' key). It's a nice example of a simple game. Watch for the explosions!
Balloons	By Poul Henriksen screenshot	A simple game illustrating the use of the mouse support introduced in Greenfoot version 1.4.0.

Additional scenarios

turtleGraphics	By Poul Henriksen screenshot download	An implementation of the well-known, and still popular turtle graphics framework. Turtles are programmed to move over the screen while dragging a pen along, thus creating interesting drawings. This scenario demonstrates how turtles can be easily programmed in greenfoot, with all the advantages of programmability, interaction, concurrency of multiple turtles, and more.
robots	By Poul Henriksen screenshot download	'robots' is a simple robot microworld inspired by Karel the Robot. Robots, Beepers and Walls are placed in a grid, and the robots can then be programmed to perform various tasks. It is intended to demonstrate how greenfoot may be used for Karel-like scenarios. Not, this scenario isnot yet ready for use in teaching - it rather is intended to show how such a scenario may be structured. Some work may be needed before it is used with students.
shapes	By Tony Beaumont screenshot download	'shapes' was inspired by the shapes example distributed with BlueJ (and discussed in the first chapter of the Objects First book). While BlueJ represents a slightly schizophrenic view of the objects (it has two separate representations), this project demonstrates how greenfoot solves this problem and allows direct interaction with the graphical shapes.
boids	By Poul Henriksen screenshot download	A scenario that demonstrates flocking behaviour. Bird-like creatures ("boids") fly around and display some social behaviour: they like to flock together. Someone could make this scenario much more interesting by putting some obstacles in...
lifts	By Michael Kölling screenshot download	A lift simulation. This scenario shows three lifts in a building with several stories. People appear and move up or down in lifts. This scenario is incomplete. It shows the basics, but several aspects are not implemented (people, for example, don't disappear from the floors; no sensible algorithm is implemented for lifts, etc.) The main purpose of this scenario is to serve as a model for animations of this kind.
MBCS	By the AP College Board screenshot download	The MBCS ('Marine Biology Case Study') is an example project used by the US Collage Board for the AP Computer Science course in the USA. (See here.) This scenario is the Greenfoot version of the original case study. Minimal changes have been made to the source code to allow execution in Greenfoot. The original code is still intact, and may be used to study for the AP exam. Benefits of using the case study in Greenfoot come from integrated editing and execution, interactive placement and method invocation, and the option to easily change images. The download includes three versions: a base version, a version with breeding fish, and a version with three different types of fish.
TextWorlds	By John Pais screenshot download	These scenarios only work with Greenfoot releases prior to 1.4.0 A sequence of four elementary projects illustrating as simply as possible how to do some basic things with images. In addition, I have included four QuizWorld projects: QuizWorld00, QuizWorld01, QuizWorld02, and QuizWorld00-02, three ten question quizzes and one combined thirty question quiz which demonstrates how easy it is to combine them. The collection of projects illustrate how I plan on using this material with students. A second version, TextWorldsEncrypt, includes RSA encryption/decryption to the QuizWorld projects for the truth value array of each question. The information to determine the truth values of each question answer is still available (with effort) in the decrypt method, however when taking a quiz one can no longer immediately see it merely by opening the corresponding numbered question file.
Asteroids	By Poul Henriksen screenshot download	A simple implementation of the classic space shooter game Asteroids. The goal of the game is to navigate an asteroid field with a spaceship, without being hit by the asteriods. The spaceship is navigated by using the arrow keys. The asteriods can be shot by pressing the space-bar. When asteriods are hit enough times they will divide into two smaller asteriods or disappear. This scenario demonstrates how to use keyboard controlled actors and sound.
Hamster	By Dietrich Boles screenshot download	The "Java-Hamster-Modell" is a well known microworld in Germany (see www.java-hamster-modell.de ). There is only a German version. It is similar to Karel the robot. This is a Greenfoot scenario for the "Java-Hamster-Modell" (in German).
Game Of Life	By Dietrich Boles screenshot download	Conway's Game of Life.
Piano	By Michael Kölling screenshot download	A simple on-screen piano. This project demonstrates how you can play sounds easily. You could also alter the sounds being played by recording your own, and binding your own sound files to the keys.
Pong	By Thomas Koch screenshot download	A nice implementation of the classic 'Pong' game. (Uses the keys 'a' and 'z' for controls - users with a non-English keyboard layout - e.g. German - may have to change the key assignments in class 'RedPaddle'...)
Maze	By Paul E. Buis screenshot download	Here is a scenario I developed to solve mazes. It is essentially a depth first search of the graph the represents the maze.
Breakout	By Barbara Ericson screenshot download	Classic breakout game.
MiksAsteroids	By Michael Kölling screenshot download	A variation of Poul's asteroids game, with multiple levels, score counting, and a "Game Over" board.
Foxes and Rabbits	By Michael Kölling screenshot download	This is a typical predetor/prey simulation. Rabbits breed, foxes eat rabbits. This project also contains an object that plots the population of foxes and rabbits in a graph.
Animation	By Michael Kölling screenshot download	This scenario is a very simple demo showing how to use the 'AnimatedActor' helper class to use an actor with an animated image.
RoboCode	By Daniel Heffernan and Chris Exton screenshot download	An implementation of the classic RoboCode framework in Greenfoot.
MineSweeper	By Joseph Lenton screenshot download	An implementation of the classic Mine Sweeper game. This game illustrates the use of the mouse support introduced in Greenfoot version 1.4.0.
Wave	By Michael Kölling screenshot live demo download	A simple physics demo: play with making waves on a string. (Before downloading, you can also try out this online demo.)

maintained by Poul Henriksen and Michael Kölling.