This guide details how I managed to get the Film Fanatic achievement.

Due to very little testing, the exact requirements of this achievement are not known. But I manged to get it; so you should be able to, by following in my footsteps.

Additionally, I got the achievement while playing around with the final stages of the scenario and trying different things. As such, I may be mistaken about the final devolution step.

Now let's get started!

Virus Genes:
ATP Boost
Ion Surge
Teracyte
Extremophile
Together Strong

Difficulty:
Casual
(This will allow greater control over cure research and reduce the likelihood of the virus being discovered unexpectedly.)

Begin in:
USA
(Not sure if this is absolutely necessary, but why take chances, right?)

The idea here is to create a huge DNA farm using colonies. This will allow us to afford any devolutions we require (which will be pretty much all of them for a while).
Worrying about human infectivity at this point is a waste of time, so we won't be evolving Transmissions in this section. Instead, we'll be focusing almost entirely on Abilities.

Devolve: Any symptoms that evolve apart from Neuro-Enhancement 1 and Neuro-Enhancement 2

Evolve:
Simian Neuro-Genesis
Ape Colonies (Create a colony in USA immediately)
Cognitive Shift
Education
Social Cohesion
Organised Travel

Hopefully by this point, Mexico will have a few infected apes. Continually send these apes to those hard-to-get to islands; Greenland, Iceland, Phillipines, New Zealand, New Guinea, Madagascar, UK, Carribean, Japan.
If mexico runs out of apes (it will), just wait until they get re-infected and keep sending them.

While that's happening, Evolve:
Logistics
Seafaring
Horseback Riding

It's not necessary to send apes directly to these locations, but as soon as you can, establish ape colonies in the following countries:
West Africa
Central Africa
East Africa
Sudan
India
China
Indonesia

We just want to make every single ape in the world intelligent. So, while we're waiting for the infection to spread on its own so that you can establish colonies in the above countries, Evolve:
Drug Resistance 1
Genetic Hardening 1
Genetic Hardening 2
Genetic Reshuffle 1
Genetic Reshuffle 2
Hardened Reshuffle

Make sure you're still devolving those symptoms, but take no further action until every country at least has a few intelligent apes. Once this condition has been met, proceed.

Now that the apes are pretty much ready, it's time we turned our attention to the humans. By now, the virus has probably reached Europe, which is good. But it's time to give it a little push with Transmissions.

Devolve: Any symptoms that evolve apart from Neuro-Enhancement 1 and Neuro-Enhancement 2

Evolve:

Water 1
Water 2
Air 1
Air 2
Extreme Bioaerosol

No other transmission other than the above are necessary. If you evole any that increase random mutation, you'll just have more things to devolve for a bit longer.

Also Evolve:
Primal Awareness
War Paint
Covert Expertise
Ape Rampage
Primal Hunt
Weapon Creation

Once the above have been evolved, take no forther action (aside from devolving symptoms) until everyone on earth is infected. This may take some time, but as long as the virus isn't harmful, nobody should suspect a thing.

If any Gen-Sys labs pop up- destroy them. More on that in the next section.

Lastly, Evolve:
Ape Migration
Scouts
Pathfinders

This is to concentrate every ape in the world into the more easily managable colonies.
There will be a few island countries that some apes get stuck on; migrate them to the nearest colony.

So, every ape and human in the world is now infected.
Time to make people die.

[Save 1]
In the case that you experience issues with the following steps, it is advisable to save at this point.

Evolve:
Neuro-Enhancement 3

You may now stop devolving symptoms, just don't let things get too out of hand. We want smart people dying slowly so that they get quite a bit of the way through the cure research, but also make the governments of every country collapse to get the conditions right.

For best effect, evolve a lethan symptom, let a few million people die, then un-evolve it.

If a drone strike targets a colony, move it elsewhere.

Carry on destroying Gen-sys labs as they appear, but this has to stop if you see a message about any country's government collapsing. That is how we know research is about to stop progressing.

Once you see a country's government losing control, devolve all lethal symptoms (people may keep dying at 0 lethality for some reason, but that can't be helped). Allow cure progress to reach 70%. Once this is done, start super-murdering them as fast as you can. Cure progress should grind to a halt. If this does not happen, go back to Save 1 and retry.

Once the cure progress is above 70% and frozen completely (should happen somewhere between 2 and 1 billion people left alive):

[Save 2]
The last bit is also tricky, so this should be useful.

Make sure you still have an ape colony in USA (not sure if this is absolutely necessary, but again, can't hurt to be safe).

Evolve:
Any lethal symptoms you like, maximum lethality. Continue killing people until there are around 5.5 million people left. Or as close to this number as you can get.

Once you have reached the 5.5 million target, Devolve:
Every Symptom (apart from Neuro-Enhancement 1, 2, 3 and Total Brain Death *Note: I am unsure if this also needs to be devolved)
Drug Resistance 1
Genetic Hardening 1
Genetic Hardening 2
Genetic Reshuffle 1
Genetic Reshuffle 2
Hardened Reshuffle

This will make the cure progress shoot up to 100%, and the cure will begin deploying immediately.
To make sure enough people die for us to win the game:
Pause
Make every ape colony rampage.
Wait a few days.
Repeat as necessary.

If the cure gets rolled out too quickly, reload Save 2 and try again (maybe try get a little bit closer to 4mil people left before devolving.

(Hopefully) Congratulations! You should now have the achievement!
For additional tips about the triggering the achievement, see the below Tips guide by -=DEO=-
https://steamproxy.com/sharedfiles/filedetails/?id=604666262