Swiftness

Swiftness is a true speedrun badge: you must reach the 99-day mark in 90 minutes or less, and that pure time pressure is why it carries a steep 4 difficulty stars. The reward is a modest 4 diamonds, so this one is chased for the bragging rights and the leaderboard flex more than the loot.

The clock is the enemy here. Days tick on a fixed timer, so the trick is never wasting daylight: keep moving, never let your fire die (which slows you down to defend), and avoid getting dragged into fights you do not need. Skip the loot detours and only grab what feeds you or upgrades your fire. A clean, aggressive run with minimal deaths is far faster than a cautious hoarding playthrough.

The most reliable approach is a small, coordinated team that splits chores, one player gathering wood and food while another scouts and clears threats, so no single bottleneck eats your minutes. Track your real-world clock against your in-game day; if you are behind pace around day 50, you almost certainly will not make 90 minutes, so reset and try a faster opening.