Endless Boss Fight is a free-to-play, fast-paced arcade game developed by Kongregate for Android devices. In this game, you will experience intense beat em' up action against an ever-evolving Boss Robot that only gets more cunning and difficult. You can customize your weapons and attacks to get your way to the top.

One of the game's unique features is the ability to design your very own Boss and have it wreck havoc against other players as you climb the global ranks and leagues. The game is both single and multi-player, where you control a small robot fighting a huge boss. You can power up your character to take on even more powerful versions of the Boss and complete dozens of missions meant to test your skills in battle. The game also has a robust upgrade system that lets you customize your character, and you can climb the PvP ladders for both your active fighter and your own Boss.

Overall, Endless Boss Fight is an engrossing arcade beat em' up action game that provides a challenging and exciting experience for players who love action-packed games.