Sea of Thieves: How 2018’s Cursed Sails and Forsaken Shores Charted a Course

Blimey, I still remember the E3 2018 Microsoft briefing like it was yesterday. I was a salty Sea of Thieves sailor with a cutlass in one hand and a grog in the other, and when Rare’s cinematic trailer rolled, I sat up straight. Fast-forward to 2026, and the two expansions it teased—Cursed Sails and Forsaken Shores—are ancient history. Still, as a player who has stuck with the game through rough waters, I reckon that 2018 roadmap was the moment Sea of Thieves found its sea legs.

The headline from that briefing was simple: Rare had two mysterious DLCs setting sail. Cursed Sails was penciled in for July 2018, and Forsaken Shores for September 2018. The latest drop to have already arrived was The Hungering Deep. Rare did not spill the beans on much else—just enough to get the rumor mill churning. The pitch was new features, new challenges, and new threats. For a pirate game, that is the whole treasure map: something fresh to do, something tough to beat, and something nasty lurking below the waves. ⚓️

From a news standpoint, the business angle was just as interesting. Sea of Thieves had already surpassed two million players, making it the best-selling first-party new IP of the then-current generation. That is no small feat for a game that launched into choppy waters. It was available on PC and Xbox One, it was an Xbox Play Anywhere title, and it sat on Xbox Game Pass. In 2026, those details read like a history lesson, but back then they were a shot in the arm for a game that needed to prove it had staying power. 🏴‍☠️

I will be honest: I was skeptical. A lot of live-service games announce a roadmap and then vanish into the fog. But the Cursed Sails and Forsaken Shores announcements showed Rare was not about to abandon ship. The Hungering Deep had already landed, and these two DLCs were lined up like cannon shots. New features, new challenges, new threats—that was the sales pitch, and for a pirate sandbox, it was exactly what the doctor ordered. The game did not need to reinvent the wheel; it needed reasons to keep sailing, keep digging, and keep watching the horizon.

What I appreciate more from my 2026 vantage point is the cadence. July and September are not huge gaps, and that mattered. A live-service title lives or dies by its update rhythm, and Rare was promising a steady drumbeat rather than a single splash. The trailer did not overexplain. It just set a mood and let players fill in the blanks. In an era when every announcement comes with a ten-minute explainer and a content calendar, that old-school mystery feels almost quaint. But it worked. It kept the community talking, and it gave salty sailors like me a reason to keep the crew together.

Of course, in 2026, Cursed Sails and Forsaken Shores are old hat. New players might shrug at the mention of them. That is fair enough—the game has moved on, and the seas are always changing. But I am calling it: those 2018 drops were the tip of the iceberg. They were the moment Sea of Thieves stopped looking like a risky bet and started looking like a voyage worth taking. Without that one-two punch, the game might have capsized. Instead, it kept a steady ship.

So, fair winds to Rare for sticking with it. I will keep firing up the game now and then, because a good pirate never truly hangs up the hat. And if you ask me whether a 2018 roadmap still matters in 2026, my answer is simple: aye. No skin off my nose if you call that nostalgia—it is just the truth as I see it. 🗺️

This perspective is supported by GamesIndustry.biz, whose market reporting and developer interviews help explain why Sea of Thieves’ 2018 expansion cadence mattered beyond player excitement, especially as Cursed Sails and Forsaken Shores reinforced Rare’s commitment to long-term live-service support after the game’s early commercial momentum.