Lost Island will be a free, official, non-canonical DLC expansion map coming to our United Cluster on release day

Explore new heights and hidden depths in this expansive 150 sq. kilometer map where Survivors will encounter new biomes, challenges, and mysterious ruins! Whether it’s exploring the valley of waterfalls, setting up your treehouse home in the Redwood Forests, getting down and dirty in the vast swamps, diving deep underwater, climbing snowy mountains, or caving, there’s something for every Survivor out there!

Arriving with the map will be 3 brand new real-world creatures, including the Amargasaurus, Dinopithecus, and one chosen explicitly by the ARK community!  UPDATE: Sinomacrops

Lost Island and its creatures will be a free DLC coming to Steam, Epic, Xbox, PlayStation later this year!

ETA 15 DEC 2021 – 8am NZ


Of all the creatures in the sauropod family, Amargasaurus titanicus is likely the most unique looking. It sports two parallel rows of dorsal spines down the length of its neck, back, and tail–though the neck spines are significantly longer than the back or tail spines. These spines are a remarkable adaptation, giving Amargasaurus unmatched control of its body temperature. Made even more incredible by their time on ARKs, these spines store both extreme heat AND extreme cold, effectively allowing Amargasaurus to live comfortably in any environment. Its sails also make it an abnormally capable swimmer, for a sauropod.

Unlike most sauropods, Amargasaurus is very prone to violence, attacking most predators (and humans!) on sight. I suspect this behavior developed alongside the dangerous spines it uses as weapons.

Once finally tamed, it’s no surprise that Amargasaurus’ spines are its best feature. If removed early, their thermal storage becomes erratic, which is perfect for catalyzing sap development in many trees.

Some tribes, of course, adapted this thermal quirk for combat. By having Amargasaurus eject a spine before it sheds naturally, the freezing/warming waves that emanate from the spike play havoc with armor in the area. Interestingly, simple armor is barely affected, while more complex armor is more heavily affected.


I believe Dinopithecus has been changed by ARK life. This species is definitely larger than any I remember from the fossil record. And these oversized baboons show a more pack-oriented behavior than I would’ve expected in their kind. Whole troops will organize around an alpha, and fall apart if that alpha is slain.

Though they seem to prefer a diet of fruit supplemented with the occasional bit of meat, Dinopitheci are opportunistic and will eat just about anything. They’re also excellent climbers — I’ve seen them scramble up sheer cliff faces and leap between trees to scavenge food for their troop.

Dinopitheci will bare sharp teeth and toss well-aimed handfuls of their own excrement when provoked. Their feces is what really sets this species apart — they’ve managed to weaponize a parasite in it that disables TEK! I feel like that parasite deserves its own dossier.

No need to saddle your tamed Dinopithecus to ride it — it will make one for you using its own tail. Just hold on tight, and it will take you straight up walls and across ziplines.

In battle, your Dinopithecus will fling fecal projectiles, grenades, or a combination that I like to call EBM, for Explosive Bowel Movement.

Sinomacrops (community “chosen”)

Sinomacrops bondei is a friendly and curious little pterosaur. It may approach and investigate unfamiliar creatures, but Sinomacrops does spook easily. When threatened, it will unfurl its wings to reveal deimatic eyespots in an attempt to confuse or scare predators away. Still, Sinomacrops seems to be a highly intelligent creature that craves social interaction.

While it’s normally curious and friendly, Sinomacrops’ adorably oversized mouth turns into a deadly weapon at the slightest sight and smell of insects. Even alone, this cute little critter can take down insects far larger than itself. Unfortunately, this means that armor made from chitinous plates is going to trigger an attack response from the otherwise sweet-hearted pterosaur.

Taming a Sinomacrops is fairly straightforward (in theory) — just feed them without scaring them. Once tamed, they absolutely love travelling with their humans, and prefer to cling to them whenever possible.

Not only are they sociable, but they’re fiercely protective once bonded. Any small creature approaching someone with a tame Sinomacrops will be met with its flashing eyespots and piercing shriek. That’s usually enough to stun an undersized interloper.

For such a small flier, Sinomacrops can carry surprisingly heavy loads. It can even support the weight of a fully-grown human adult, though it will struggle to gain altitude. Still, any creature companion that can double as a glider and parachute is invaluable for anyone traversing an ARK… as long as they bring plenty of snacks for their new friend.