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Tank Island\n\nTank Island is an open source 2D top down shooter game that was created with Ruby using\n[Gosu](http://www.libgosu.org) game development library while writing\n[this book](https://leanpub.com/developing-games-with-ruby/).\n\n## Screenshots\n\n![Tank Island Game](https://leanpub.com/site_images/developing-games-with-ruby/50-hud.png)\n\n![Tank Island Game](https://leanpub.com/site_images/developing-games-with-ruby/54-visual-debugging.png)\n\n[Gameplay video on YouTube](http://youtu.be/c2M_zJ9KcS8)\n\n## Book: Developing Games With Ruby\n\nComplete process of building this game is described step by step in this free to read book:\n\n[Developing Games With Ruby](https://leanpub.com/developing-games-with-ruby/read)\n\n## Installation\n\nBefore installing, make sure you have:\n\n- Ruby installed, preferably through [rbenv](https://github.com/sstephenson/rbenv), not rvm.\n- ImageMagick (`gem install rmagick` should work).\n- Gosu prerequisites for [Mac](https://github.com/jlnr/gosu/wiki/Getting-Started-on-OS-X),\n    [Linux](https://github.com/jlnr/gosu/wiki/Getting-Started-on-Linux) or\n    [Windows](https://github.com/jlnr/gosu/wiki/Getting-Started-on-Windows)\n\nTo install it, run\n\n    $ gem install tank_island\n\n## Starting the game\n\nThere are several ways to start the game.\n\n### Running in 800x600 window mode\n\n    $ tank_island\n\n### Running with custom resolution\n\n    $ w=1600 h=1200 tank_island\n\n### Running full screen with custom resolution\n\n    $ fs=1 w=1200 h=800 tank_island\n\n## Controls\n\n### Gameplay\n\n- `W` `A` `S` `D` moves your tank.\n- Mouse `left click` shoots.\n- `ESC` goes into menu and away from it.\n\n### Debugging\n\n- `R` respawns your tank.\n- `T` spawns an enemy tank under mouse cursor.\n- `F1` enters debug mode.\n- `F2` toggles 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