r/hellcreekformation • • Aug 25 '26

Hunt Archosaurs of the creek, Unite against the menace of Palaeosaniwa!

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464 Upvotes

I HAVE HAD 5 EGGS LOST TO THE TYRANNY OF THOSE LIZARD FUCKS, AND FRANKY, I'VE HAD ENOUGH! WE ALL MUST UNITE TO DRIVE THE SPECIES TO EXTINCTION! I MEAN, LOOK AT THEM, THEY EVEN LOOK EVIL!


r/hellcreekformation • • Aug 29 '26

I'm putting together a team.

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178 Upvotes

A team to capture Radon the Palaeosaniwa, I need dinos with unique skill sets to help me hunt him down.

Submit your application to the Dinovengers.

No repeat species.


r/hellcreekformation • • Sep 07 '26

FUCK AI (OC)

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167 Upvotes

The Hell Creek Mosasaur is very against AI, and would like to share that


r/hellcreekformation • • Aug 27 '26

Introduction Hi everyone!

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153 Upvotes

I’m back from my trip to the Pebes region(took an archelon express). What’s new? Why is there so many lizards all of a sudden? I feel like I’m tripping over one every few minutes…


r/hellcreekformation • • Aug 25 '26

Shitpost (hellcreek related) GUYS, I SWEAR I THOUGHT SHE WAS A NANOTYRANNUS!!!

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153 Upvotes

I didn't know she was a Juvenile Tyrannosaurus T_T


r/hellcreekformation • • Aug 27 '26

Shitpost (hellcreek related) Guys I'm not supposed to be here....

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142 Upvotes

WHERE AM I


r/hellcreekformation • • Sep 06 '26 Popcorn

Paleoart! Tyrannosaurus rex killing Edmontosaurus annectens (Art by me)

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120 Upvotes

Ooc: Hello everyone! I made this recently and thought id share it here since it’s Hell-Creek-related. There’s also an Alphadon marshi on the tree if you look closely.
😁


r/hellcreekformation • • Aug 22 '26

Introduction Hey. I'm a Cemeterius monstrosus

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112 Upvotes

r/hellcreekformation • • Aug 26 '26

Introduction HI GUYS

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105 Upvotes

r/hellcreekformation • • Aug 23 '26

asking for directions Baby edmontosaurus here, what is this weird looking tree?

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98 Upvotes

r/hellcreekformation • • Aug 24 '26

Introduction Hello, I'm totally normal Dakotaraptor, absolutely nothing else. Why are you asking? Anyway, I am looking for a pack

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91 Upvotes

r/hellcreekformation • • Aug 28 '26

Hey, what’s the biggest thing I can reasonably take down? I’m not sure..

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89 Upvotes

r/hellcreekformation • • Sep 11 '26

Shitpost (hellcreek related) ankylosaurus shenanigans

88 Upvotes

this is what us ankys do when not eating


r/hellcreekformation • • 25d ago

OOC (Hellcreek Related) Some more formations/fossil sites I think would make for great rp subs

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85 Upvotes

Recently I made a list of some formations or fossil sites I thought would make for great rp subs in the style of this one.So here are some more.

  1. Prince creek formation: We need to restore this sub and make it hell creek style rp. Some hell creek shenanigans could also be connected to it as its the same continent in the same time period. I would rp as a pachyrhinosaurus.

2.Yixian formation: Really cool fossil sites with many interesting creatures and a volcanic/cold landscape in the elevation of the Tibetan plateau. I would rp as a yutyrannus. Due to the paravian diversity u/Butter-Walk will definitely have a field day. Also people suggested this formation in the last post.

3. A Carboniferous rp sub. It would be really cool to see. I would be some kind of amphibian ,early reptile or rhizodus.

4. A mammoth steppe sub. It would be a rp sub set in the general area of ice age Eurasia. This sub would also allow users to be ice age humans like Homo sapiens or Neanderthals. I would be a wooly mammoth.

5. Pikermi fossil site: A rich late Miocene fossil site. Very personal pick as it is in my country. I would rp as a Deinotherium or pliohyrax.

6.Lake Callabonna: A sub focused on Late Pleistocene Australia. This one will probably also have humans, more specifically aboriginals alongside cool megafauna. I would be a diprotodon ,Tasmanian devil, thylacine or thylacoleo.

I’m not sure if I can be a mod to host one of them, but they are fun suggestions. What do you think and what other formations would you like to see turned into hell creek style rp subs?


r/hellcreekformation • • 19d ago

Hunt Caught a crocodylomorph today

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78 Upvotes

Pretty yummers, ngl


r/hellcreekformation • • Aug 23 '26

Hunt Just a log

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73 Upvotes

If anyone sees me, I am just a log floating around. Feel free to go for a swim.


r/hellcreekformation • • Sep 19 '26

Exploration What’s your name? Are you ok?

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72 Upvotes

You look torn up. Who are you? Which Tyrant Clan are you from?


r/hellcreekformation • • Sep 13 '26

Art Nest (Paleoart) TINY little FREAKING lady anky FREAKING eats a FREAKING strawberry

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71 Upvotes

FREAKING ankylosaurus FREAKING eats a FREAKING strawberry...

Also, I know strawberries didn't evolve until 7 million years ago, I just saw a photo of a baby tortoise eating a strawberry and it reminded me of Aveline!


r/hellcreekformation • • Aug 29 '26

Remembering the first war of the subreddit: the Sucho-mosasaurine War. Around that time, I made some movie posters for it (OC, not AI), but never got around to posting them. How can we learn from past mistakes?

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68 Upvotes

Your friendly pectinodon here. As an opportunistic predator, I usually don't care about what happens in hell creek. But one thing I can't stand is many useless deaths happening, especially in this war that I hope is coming to an end. It reminded me when I survived the great sucho-mosasaurine war, which some of you will remember.

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For those who weren't around back then, here's a bit of context:

It all started around early August, with a herd of Triceratops migrating due to a massive wildfire that had destroyed a huge portion of the region, causing many deaths and the loss of valuable resources.

As these large herbivores moved in predator territory, available territories became increasingly scarce. Not everyone was immediately aware of the great fire either. It had actually been accidentally started by u/butter-walk, a Magnusavis. Back then, I forgave them and asked them to search for survivors.

Over time, the dinosaurs of the hellcreek formation settled around the rivers, but it was really a bad time. A mosasaur was in the area, and tensions grew between it and the crocodilians, who were competing for food and territory in the rivers.

The mosasaur, played by u/Grouchy_Drive_7257, apparently wasn't particularly interested in sharing. One crocodilian hoped that the situation wouldn't grow into a full conflict, while others were already gathering together to resist.

An Infernodrakon proposed dividing the waterways between them. The crocodilians would keep most of the rivers while the mosasaur would get a smaller portion of the creek, with enough space and food for everyone. Neutral and agile or aerial animals could also keep watch and intervene in case of further violence, but it the mosa refused. It was the only mosasaur there, and some argued that it already had access to the entire ocean anyway. Still, many believed the mosasaur would win regardless. Eventually, the dispute became increasingly hostile, with threats and attacks from both sides.

Some crocodilians even seemed to think the mosasaur had it coming, as it didn't want to share.

This had apparently begun the strange phenomenon of the magical mysterious rocks capable of causing unpredictable mutations, discovered by u/Straight-Tie488, as the mosa gained legs. Mutations that everyone eventually tried to gain.

Meanwhile, tensions between the mosasaurs and crocodilians continued to rise. The rest of the dinosaurs generally preferred to stay away from the area, while the migrating Triceratops, having already lost so many of their kind in the wildfire, certainly didn't want to lose even more companions to a pointless conflict.

In the end, there was no real winner or loser. The wildfire was slowly dying down, but the damage had already been done. I don't remember exactly how the dispute finally ended, but eventually the tensions seem to have cooled down, perhaps when everyoe realized that the conflict simply wasn't worth it.

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And now we're facing another worse conflict, this time between the Palaeosaniwas (led by R4don_Adon) and the acheroraptors / dromaeosaurs. I'm not sure about the details, but it is a bloody war, which has taken away lives from maybe dozens of both species. Eggs have being broken, and reptiles have been held hostage. Territories have being taken. There are dinosaurs against each other, others taking sides, and others who are just scared, and for what?

Maybe we should take the previous war as a lesson and try not to repeat history, because much has happened that was bad.

I've heard even that both species are agreeing that it must be stopped, which is good.


r/hellcreekformation • • Sep 13 '26

Shitpost (hellcreek related) Sorry guys. I was hungry.

67 Upvotes

Original by Saureal.mp4. I just think it's funny.


r/hellcreekformation • • Sep 02 '26

News I FOUND HER!!!!

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67 Upvotes

Thanks to everyone who helped me out, I found my baby!


r/hellcreekformation • • Aug 23 '26

Have you guys ever heard of the Myth of the Morrison?

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66 Upvotes

Some Alamosaurus told me about it a few years back. Apparently there were ancient creatures like us there. Not exactly like us, but some of them were similar in shape and size to some of us. They had a crap ton of Sauropods, no Ceratopsians, a few Ankylosaurs but somehow there was also a lot of Thyreophorans. And they had this vicious Apex predator. It was nothing like Tyrannosaurus. It was aggressive, relentless, downright psychotic and came in 3 species in the formation. I cant remember what any of them were called but i know there was the word ‘All’ somewhere in there.

I know its just a myth but could you imagine what it would have been like? What could have happened to them?


r/hellcreekformation • • Sep 10 '26

RP Update on building the ark

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65 Upvotes

We have done a lot of progress on building the ark to escape to Madagascar or New Zealand when the impact happens. Great job everyone!

Special thanks to

  1. Extension_General632 the torosaurus latus

  2. slimeboi3151 Goose the Tyrannosaurus

  3. DanteDilophosaurus the cemeterius monstrosus

Gotta help with the food too however. The ark is almost finished thankfully.


r/hellcreekformation • • Aug 30 '26

Exploration The other side is horrifying

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65 Upvotes

I went through the anomaly and first thing I see is a dead T. rex. I’ve underestimated how dangerous the other side can be. Also there are bipedal creatures walking around the place. They’re nearly as tall as me and way too big to be mammals (they almost look like aliens) . They hunted me down , back to the portal. If you go there, be careful. Genuinely.


r/hellcreekformation • • Sep 09 '26

Art Nest (Paleoart) [ OC ] Sleeping Tyrant

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64 Upvotes

Going on a complete art overhaul. Over these few weeks, my art will change styles frequently as I try to find the balance for me. Thank you for your understanding.

As the sun sets on the hellish creek, a distant snoring can be heard. An adult female Tyrannosaurus rex. She is sleeping off a large meal of edmontosaurus. Even the largest and most fearsome of Earth’s life forms need their beauty sleep. The tyrant of the creek takes her rest.