Just One Boss

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Just one boss is a fun and challenging arcade game in which you have one aim – to defeat the boss! As the title suggests, you have only one boss to defeat, but this boss is difficult and cunning! You control a cute little blue slime ball and you must move around the playing field avoiding the boss’s attacks. To damage the boss, you must move over the white tiles that appear.

Keep moving and watch for the attack pattern the boss displays. You must move quick and return to the white tiles frequently to have any hope of defeating him! This game has cool retro 8bit graphics, quirky music and exciting gameplay. Jump into the arena and try to defeat just the one boss today!

Release Date

February 20, 2018


Just One Boss is made by bridgs. You can follow the developer on Twitter and show some support on and Ko-fi.


  • One stylish boss with a different attack phase
  • 8-bit graphics with a simple controls
  • New challenge after you successfully emptied the boss's health bar
  • Hard mode after you beat the game


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More Information About Just One Boss

Just One Boss is an amazing platform game that you can play here, free of charge. It has received 9,100 plays and has been rated 8.6 / 10 by 77 people. This highly addictive action game is powered by Flash to run without trouble in modern browsers. If you enjoy the game, check out our other platform games or to Fireboy and Watergirl 5: Elements and Crazy Roll 3D.



How to play Just One Boss
  • Use arrow keys to move
  • Right arrow to start game

Walkthrough Video

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