There's quite a few things that could be going on here. The first two things that we should rule out are:

1. IIRC the research screen gains a scrollbar if there are too many items to show. In reality, this only happens with mods installed so we don't see it very often. Any chance the extra animals can be found by scrolling down?

2. If animal availability was set to anything other than "everything available" during the generation of the sandbox then some animals could be excluded from research. They may be available via trades or merchants.

If it's not those then some more investigative work will be needed. Perhaps you could describe what's going on in more detail.

What animals were you expecting to be available to research, and which animals were actually available? Is there some pattern to the animals which are not available. Perhaps post a screenshot too. We could take a look at the log file as well just to be sure (C:\Users\<insert username>\AppData\LocalLow\Twice Circled\Megaquarium\output_log.txt).

Finding the solution to things like this is often about piecing lots of different bits of information together which point to the answer. Kind of like a puzzle. ;)

Ok so Up until rank 5, every science project shows up, but then only the animals from the first two mods are available (i want to add that i load the second pack on the ordovician before the first one for reasons), and i fear this might extend to tanks too as there's only one too (might be weird since every rank has it's handful of tanks to research). Also, the save has been loaded with the everything available so it's not a gameplay mistake. I will try to send the log in a few hours

Hey TrattorinoZ,

If you clicked an item for research and it finished researching, would another item fill that gap?

Originally posted by Timmiegun:

Hey TrattorinoZ,

If you clicked an item for research and it finished researching, would another item fill that gap?

I recall that wasn't the case, i don't even think the game doesn't do that anyways

Hey so I've encountered a bug around this as well when I just tested it, but I think there are two things going on.

With the Artificialis mod series all the animals are set to rare 2, so if you have trades/merchants on, usually all but 1 or 2 will be only available that way. A way of bypassing this if you'd like all Artificialis mods available for research (or any other using this method) is to disable them, start the new map, then re-enable them. All mods added after a new map is started seem to default to being available through research.

The bug I encountered that sounded like what you were experiencing is that starting the rank after you start a sandbox, not all of the science research items were appearing. It may be that it only occurs when you have enough extra science unlocked items as I hadn't seen this in my past playthroughs with science unlocked animals, but it has been a few months since I've done one. My current work around for that is to toggle show unlocked, and usually the unavailable research items then appear.

Tested some things, looks like Megaterrarium overwrites all the science unlocks for ranks 5 and 6, removing it solved this issue but re enabling it hide all the unlocks again. I'll send the creator a message so hopefully he can figure out the issue on his end

Originally posted by Tenth Architect:

Tested some things, looks like Megaterrarium overwrites all the science unlocks for ranks 5 and 6, removing it solved this issue but re enabling it hide all the unlocks again. I'll send the creator a message so hopefully he can figure out the issue on his end

Thank you so much man, hope Khaydar finds a fix soon.

Topic moved to Workshop discussion as problem was found in this category

So has anyone found some kind of solution aside from disabling megaterrarium? Is Khaydar in knowledge of the problem?

Khaydar is aware and tried a fix earlier this month, but I haven't tested it since. Are you still encountering the issue?

Originally posted by Tenth Architect:

Khaydar is aware and tried a fix earlier this month, but I haven't tested it since. Are you still encountering the issue?

I'm sorry for answering only now after all this time, but no, the problem's still there. What's khaydar's say about this by the way?

I'd say message him directly or post about this on one of his mods so he can trouble shoot it more effectively