Google Chrome Dino is a simple, offline game that appears in the Google Chrome web browser when there is no internet connection. The game features a pixelated dinosaur that players control by jumping over obstacles like cacti and birds. The objective is to achieve the highest score possible by avoiding these obstacles as the game speeds up over time. To start the game, users can press the spacebar when the "No Internet" screen appears. The Dino game has become popular due to its accessibility and the nostalgic feel of its retro graphics, making it a fun distraction during connectivity issues.