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Recap / Fate Grand Order Event 15 Chaldea Summer Memory Chaldea Summer Odyssey

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The protagonist and several Servants are about to rayshift on short notice, when Da Vinci interferes with Dr. Roman's equipment. As a result, the party is stranded on a tropical island with bizarre weather and geography with no way to contact Chaldea. Survival is a high priority, especially when it turns out they're not alone on the island...

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  • Awesome, but Impractical: A running gag throughout the first part of the event is the suggestions made by Mordred are down right awesome on paper, but ridiculous in practice. This is usually because her suggestions are designed to look as badass as possible. Notable example is the pathway option for Mordred, which is to make train tracks, on an island that does not have any trains, so they'll make mining carts to ride in! Gameplay and Story Integration occurs for this as well, with Mordred's options being the most costly to invest in.
  • Beach Episode: An easy excuse to put popular female Servants in swimsuits.
  • Big Bad: Twrch Trwyth, the demonic boar from Arthurian legend, turns out to be the first giant boar fought. During the Time Skip, he rebuilds himself as a mechanical boar and causes an apocalypse for the boar piglet civilization.
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  • Call-Back: If the player chooses to build a furnace power plant, they learn that the boar piglet civilization's electricity runs off of Altrium, as opposed to coal and oil.
  • Cuteness Proximity: The boar piglets are adored by several characters for this reason. Not so much after the time skip, where they can talk and are much less charming as a result.
  • Debut Queue: As this event is split into two parts, each half introduces a different set.
    • Part 1 introduces the swimsuit versions of Scathach, Tamamo no Mae, Anne Bonny and Mary Read, Mordred, and Kiyohime.
    • Part 2 introduces the swimsuit versions of Artoria Pendragon, Saint Martha, and Marie Antoinette.
  • Demoted to Extra: While the female Servants remain with their Master and have greater input on the plot, the male Servants spread out across the island and affect the plot tangentially. Which is lampshaded by Cu, who repeatedly tells the player him and the other males will stay out of the spotlight so the focus can remain on the females in their swimsuits.
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  • Dropped a Bridge on Him: Karna, Kojiro, and Cu are unceremoniously lost at sea in the prologue to Part 2. Cu pops up again during the main story having washed ashore, and Karna and Kojiro are revealed in Martha's Interlude to have been recruited by Beowulf as guards.
  • Early Installment Weirdness: While the latter summer events all involve some form of competition (racing, manga sales, swordsmanship), this one involves a Wilderness Survival Plot with the protagonist isolated from Chaldea.
  • Famed In-Story: Aside from being Heroic Spirits, the ten female Servants brought on the trip are revered as goddesses by the boar piglets in Part 2. Well, most of them are; Tamamo is made into a Satanic figure thanks to being the most frequent offender of threatening to eat the piglets in Part 1.
  • Fanservice: The entire reason this event exists.
  • Full-Boar Action: Several days into the "vacation", and the cast learns that there are demonic boars who are fully sentient inhabiting the island.
  • Giant Enemy Crab: Giant Hermit Crabs and their variations are basically The Goomba in this event.
  • Heroic RRoD: Blackbeard succumbs to this in the prologue, when he explores the treacherous waters around the island with the promise of getting to touch Mary afterwards. He gets his wish, though not in the way he wanted, and dies cursing the Grail.
  • It Can Think: The boars.
    • The piglets that ally with the heroes turn out to be capable of understanding human speech. They respond positively to Marie and Mordred's kindness towards them and show fear when Tamamo, Scathach and Altria consider eating them. In general, they become Empathy Pets similar to Fou, who fears being replaced by them.
    • The regular boars recognize Altria as an old foe, and show themselves to be nearly capable of speech.
    • The first giant boar encountered actually laughs while fighting the party, targets the ship they built, and makes it very clear that it's enjoying the havoc it's causing instead of being a wild animal following its instincts.
  • Never Trust a Trailer: The trailer makes the Event look like a decadent excuse to get female Servants into swimsuits. The adventure's actual plot takes a much weirder post-apocalyptic turn at the midpoint.
  • Outside-Context Problem: Beowulf in Part 2. When you first meet him in the main quest, he states his intended goal of taking over the island, suggesting he'll be fought later in the story, possibly by teaming up with Twrch Trwyth. However, dealing with him and his army is relegated to entirely optional sidequests.
  • Order Versus Chaos: At one point, Altria and Scathach ended up debating this. Altria is on the side of order and stated that in times when there was only war, destruction and chaos, order is needed to ensure the safety of men and continuing their existence. Scathach counters with how chaos is needed for people to improve and be creative, basically stating that there's a lot of cases of Order Is Not Good. Surprisingly, it ends up being a tie, that both order and chaos will continue to clash and both are needed.
  • Permanently Missable Content: If one doesn't clear the second part of the event, the swimsuit Scathach they get from clearing the first part will vanish.
  • Reset Button: At the end of the second part, Scathach leaves an Oblivion Rune on the island that will cause the piglets to regress to their previous nonintelligent state.
  • Say My Name: The first demon boar killed by the heroes looks at Altria and dies saying "AAAAAAAAARTHUR". It's the first hint as to what's behind the island's hostile nature.
  • Story Branching: Different Servants will suggest different options when building necessary facilities. The player has three options to choose from, and the other two will disappear until an entire story path is complete.
  • Wilderness Survival Plot: The protagonist, Mash, Fou, and several Servants end up stranded on a desert island while cut off from Chaldea. To survive, they must build working amenities from the resources on the island and live off the fat of the land.
  • Year Inside, Hour Outside: Part 1 ends with the protagonist and Servants leaving the island. Part 2 begins with them making landfall on the same island, except 2000 years have passed while they were out at sea. And then the end of part 2 reveals that while weeks have passed for the protagonist and their Servants, only hours have passed back in Chaldea.

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