100 Days At Sea event
100 Days At Sea: Rival Rigs — What It Included
Rival Rigs has wrapped. The week-long combat event in 100 Days At Sea ran from April 4 to April 11, 2026, sending survivors out to raid enemy-held rafts for loot and a rare progression reward. It has since ended, and this page is a record of what it involved for anyone who missed it or wants to know how it worked.
100 Days At Sea remains one of Roblox’s busier survival games. It regularly holds over 50,000 players at once and has drawn nearly 168 million visits across its lifetime, with more than four million players marking it a favorite. Rival Rigs landed during that steady run of activity, and by the time it closed over 80,000 players had marked themselves interested in it.
100 Days At Sea
RIVAL RIGS
Battle Rival Survivors!
Apr 4, 11:00 AM – Apr 11, 11:00 AM ET
Radio towers point players toward hostile rival rigs to raid; clearing their survivors and looting the special chest yields a day-multiplier buildable, with three progressively tougher rigs per run.
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What Rival Rigs included
Rival Rigs was a new-content event built around raiding. The premise was simple: other rafts out on the water were crewed not by allies but by hostile survivors, and clearing them out was how you got paid. The developer’s listing described it as visiting rigs like your own “but with hostile survivors.”
Here is how a raid run worked:
- Finding a fight started at a Radio Tower island. Interacting with the radio at its center pinged a Rival Rig, marking it both in the world and on your compass so you could sail straight to it.
- Each run surfaced three Rival Rigs, and they scaled in difficulty — the second tougher than the first, and the third tougher again.
- Defeating the hostile survivors on a rig opened its Special Chest.
- The prize inside was the point of the whole loop: a buildable that granted a plus-one-day multiplier, a long-term progression boost that made pushing to the harder rigs worth the risk.
When it ran
The event ran for exactly one week, opening April 4, 2026 at 11:00 AM ET and closing April 11, 2026 at 11:00 AM ET. A seven-day window meant there was no pressure to rush the opening day, but the raid loop rewarded repeat runs, so the players who came out ahead were the ones who kept cycling through rigs across the week rather than clearing a single set and stopping.
How it fit the game’s rhythm
Rival Rigs fit the weekly event slot Stranded Devs uses throughout 100 Days At Sea’s calendar. The developer’s schedule shows a new event roughly every week, each running about seven days before the next takes over — a rhythm visible in recent drops like Alien Invasion and the Ice Region expansion. Rival Rigs followed that same weekly format back in April, a self-contained combat week slotted between larger content additions.
FAQ
When did the Rival Rigs event end?
The Rival Rigs event ended on April 11, 2026 at 11:00 AM ET, after a one-week run that began April 4, 2026.
What was in the Rival Rigs event?
Rival Rigs added a raiding loop: players tracked down enemy-crewed rafts, battled the hostile survivors aboard, and opened a Special Chest that unlocked a buildable granting a plus-one-day multiplier. Three rigs appeared per run, each harder than the last.
How did you start a Rival Rigs raid?
You started at a Radio Tower island and interacted with the radio at its center, which pinged a Rival Rig and marked it in the world and on your compass so you could sail to it.
Is the Rival Rigs event still going in 100 Days At Sea?
No. Rival Rigs is over — it closed on April 11, 2026. The game has since moved through its usual weekly event schedule, so a different event is running now.