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Many people consider Jevil or Spamton NEO to be the hardest bosses Toby Fox has created, but Sans remains the greater challenge. The main reason is that the Sans fight is built around almost perfect execution. Unlike most Deltarune bosses, where mistakes can often be healed with healing items or recovered from by using a party, Sans gives the player almost no room for error. His attacks are relentless, highly unpredictable at first, and require memorization, precise timing, and consistent focus throughout the entire battle.
Deltarune bosses are designed around a team of characters, multiple healing options, and defensive mechanics. Even secret bosses like Jevil and Spamton NEO allow players to recover from mistakes, adapt their strategy, and survive several hits. Sans, however, constantly pressures the player from the beginning to the very end. His attacks ignore the player's expectations, introduce unique mechanics, and demand accuracy for several minutes without a break.
Another reason Sans is considered harder is the mental endurance required. The fight is long, and one mistake near the end can force the player to start over from the beginning. This creates constant pressure that few Deltarune bosses match. While Deltarune's secret bosses are fast, creative, and challenging, they are generally more forgiving and offer more opportunities to recover.
For these reasons, Sans is widely regarded as the hardest boss across both Undertale and Deltarune. His combination of relentless attacks, unforgiving mechanics, and the need for near-perfect consistency makes him a challenge that surpasses even Deltarune's most difficult encounters.
Soo.
Sans is harder that Deltarune Bosses.
waiting for hate or debating why Deltarune Bosses are harder that Undertale ones.
2026-07-13 14:14:58