During an enemy's turn, you control a small red heart (your SOUL) and must dodge incoming attacks in a style similar to top-down "bullet hell" shooters.
Your actions—whether you kill every monster you meet or befriend them all—radically alter the story, resulting in three main paths: Pacifist, Neutral, and Genocide . How to Play "Unblocked" Safely
When battles do occur, you'll use a bullet hell-inspired system, where you'll need to navigate a bullet-like pattern of attacks and defensive maneuvers. The twist? You can choose to spare your enemies, rather than defeating them.
As you navigate through the dark tunnels and lush forests, you encounter a group of monsters who become your guides and potential allies. There's Papyrus, a skeleton with a goofy demeanor, and Sans, his laid-back brother. You also meet Undyne, a fish-like monster with a passion for justice, and Alphys, a shy but kind scientist.
Several online platforms offer Undertale unblocked, such as: