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{{#seo: |title=GameBrew |title_mode=append |image=opusgamestestgb.png |image_alt=Opus Games Demos }} Here you can find a collection of demos put together by Opus Games for the Game Boy after discovering some Game Boy development websites. These demos come with source code, including a single assembly file (testGame.asm) and several other files. The compiled versions were tested on the NO$GMB emulator. Initially, they were compiled with TASM assembler. However, starting from test4, it was switched to RGBDS, which is much more functional, but required some syntax changes. ==User guide== Test 1 - Displays a small tile set and map, and scrolls the screen to the left. Test 2 - Adds a movable sprite controlled by the joypad. Test 3 - Enhances the sprite display to make the spaceship point in the direction of movement and allows firing bullets with the A button. Test 4 - Scrolling a Larger Background: Enables scrolling through a 32x64 tile background map and toggling scroll direction with the B button. The demo is available in both TASM and RGBDS versions. Test 5 - Splits the previous test into multiple files and improves scrolling. Introduces a map of tile-blocks for the game world and includes art assets like asteroids and spaceships. Test 6 - Makes improvements under the hood, such as generalizing sprite and bullet functionality. Introduces animating bullets and a tile set for generating asteroids and stars. Also features the ability to change the ship type with a button press. ==Screenshots== https://dlhb.gamebrew.org/gbhomebrews/opusgamestestgb2.png https://dlhb.gamebrew.org/gbhomebrews/opusgamestestgb3.png https://dlhb.gamebrew.org/gbhomebrews/opusgamestestgb4.png https://dlhb.gamebrew.org/gbhomebrews/opusgamestestgb5.png ==External links== *Author's website - http://opusgames.com/games/GBDev/GBDev.html
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