The first post of this thread will be about Hostile Negotiation.

After completing Photo Shoot and Have a Heart, you'll receive a phone call from Mallorie which plays out like this: <phonecall from Mallorie> Mal Niko. I'm getting worried. Roman didn't get back at all last night. Niko He likes to party. He stays out late the whole time. You know what he's like. Mal Not on my watch he don't. Something ain't right.

The moment you get this call, an 18 hour countdown begins.

-Examples-

Ex 1: If you stand still for 36 minutes (18 in game hours) and then call Mallorie, Hostile Negotiation will begin.

Ex 2: If you die between 00:00 and 12:00, 10 in game hours will pass. Then, if you wait for 16 minutes (8 in game hours) and then call Mallories, Hostile Negotiation will begin. (see the "Dying and time changes" thread for more info: http://www.speedrun.com/gtaiv/thread/odsy9 )

Ex 3: If you die between 12:00 and 24:00, you'll go back in time by however many hours it takes to reach 07:00. Again, refer to the document. So, you've just gotten the call. It's 11:30 in game. You die. Now it's 21:3X. You've gone forward in time by 10 hours. You've got 8 more hours to wait, but you die again. You've just gone back in time by 14 hours. What this means is you've just given yourself 4 more hours of waiting on top of the required 18. You now have to wait 22 hours to get the call. So, you die again. Forward in time by 10 hours. 12 more hours to wait. Die again? Back 10 hours. 22 hours to wait. Die again? Forward by 10 hours. 12 hours to wait. If you wait 24 minutes, you can call and start the mission. OR, if you could sleep two times. OR you could go to the Pay n Spray 4 times.

Ex 4: Mallorie calls at 05:00. You wait 18 hours. It's now 23:00. You die. -14 hours, back to 09:00. Do you need to wait an additional 14 hours? No, because 18 hours already passed so going back in time has no effect. The call is available to make.

An additional note: Mallorie will not call you to trigger the mission after an 18 hour wait. She'll only do this once 24 hours have passed.

So, there you go. I did extensive testing. This is how the game works, at least for this mission. More posts will come in this thread regarding other missions which are triggered by a phone call.

For "Weekend At Florian's".

After a bit of testing to try to determine when exactly Ray's call is available for Weekend at Florians, this is what I found:

As we already knew, "Hostile Negotiation" and "No Way on the Subway" need to be completed. When you complete Hostile Negotiation, two calls are unlocked, both of which you have to receive.

The first is: <phonecall from Roman> Roman Cousin, I have bought us a present. Niko You bought it, or I did. Roman Niko, I'm offended. I've got us an apartment in Algonquin. What did I say when you got here? Penthouse, model on each arm. Niko And you have paid for this place? It wasn't so long ago that your debts got you kidnapped by the Russian mob. Roman That was a cold streak. Now I'm hot, cousin. Hotter than the models we'll be bedding. I can't lose. Niko Roman, we have spoken about your gambling. Roman Wait until you see the new place, NB. You will change your song. So what, I took on a little debt?

The second is: <phonecall from Dimitri> Dimitri Niko, it's Dimitri. Niko I have nothing to say to you. Dimitri I nearly ran into your cousin the other day. My friends were hanging out with him. The party got busted up though before I got there. Niko I wish you had been there. We could have had some fun. Dimitri Not as much fun as I would have had with Roman, believe me.

The first thing you need to know is you must receive both of these calls in order to receive Ray's call. I'm pretty sure you'll always receive Roman's call first.

The second thing you need to know is 24 in-game hours have to pass AFTER receiving Dimitri's call in order to eventually trigger "Weekend At Florian's". Be aware that the 24 hours can pass before completing "No Way On The Subway".¤ After these 24 hours have passed, you can either wait for Ray to call you or you can call him.

¤If you receive Dimitri's call, let 24 hours pass, then complete "No Way on the Subway", you can immediately call Ray after the end of mission call for "NWotS".

-Examples-

Ex. 1: Receive Dimitri's call. Wait 24 hours. Call Ray and he'll answer.

Ex. 2: Receive Dimitri's call at 08:00. Die once (+10 hours, so 14 hours left to wait). Wait 14 hours, then call. He'll answer.

Ex. 3: Receive Dimitri's call at 11:50. Die once (+10 hours, so 14 hours left to wait). Wait 14 hours. 24 hours have now passed and the time is now about 11:57. You wait an additional in-game hour. If you called Ray now, it'd be fine. Instead, you die at 13:00. You go back in time by 6 hours. Do you need to wait an additional 5 hours? The answer is no. This is because once 24 hours have passed, it doesn't matter how many hours you go back in time. The call will forever be available. Ray will call you or you can call him.

Ex. 4: Receive Dimitri's call at 00:30. You wait 23 hours. It's now 23:30 and you have one more hour to wait. You accidentally die. You go back in time by 14 hours to 09:30. Now you have to wait 15 more hours. Take note that this example is meant you show you that 24 hours have to pass before going back in time has no effect. Otherwise, it does.

BTW, you can pass the time needed however you want. Dying between 00:00 - 12:00, sleeping, pay n spray, and waiting in real time (2 seconds == 1 in-game minute) all will work to pass the time. You aren't limited sitting around, if anyone was confused.

"Out of the Closet Part 2" (the day of the week has no effect on the date)

-French Tom's reply-

You would think the reply would show up in your inbox once a very specific amount of time has passed after either sending the request (with Lovemeet) or completing "Out of the Closet", but this isn't the case. The reply can show up as early as 8 hours and as late as 12 hours and 15 minutes after completing "Out Of The Closet pt.1".

Example: Complete OotC pt.1 @ xx:39, the email will come in at xx+8+rnd:45, where 'rnd' will be 0-4 hours and 45 because it rounds to the next quarter hour.

-Once his email is available in your inbox-

So, if his reply is waiting in your inbox, but you've yet to use an in-game computer (any non-police computer), you can completely control what time the original date will be for (out of the four possible times), and here's how it works: *It has to do with when you click "Web" on the first screen on any non-police computer, even the computer in the house that you access during "Wrong Is Right". "You mean I can affect the date by using a computer that's only accessible (w/o glitches) during a mission? A computer which doesn't even have access to my emails?!" Yes, that's exactly right. You don't even have to proceed into the emails. It's just from clicking "Web".

If "Web" is clicked between 06:00-09:59, the date will forever be for 12:00 in the email. If "Web" is clicked between 10:00-15:59, the date will forever be for 18:00 in the email. If "Web" is clicked between 16:00-21:59, the date will forever be for 00:00 in the email. If "Web" is clicked between 22:00-05:59, the date will forever be for 08:00 in the email.

And, no, video warping and/or dying will NOT wipe the slate clean and allow you to get a different date time if you go back and click "Web". You're stuck with what you originally caused. *

-The actual date, at the diner-

French Tom will be waiting at the diner -03:00 hours ahead of the scheduled time and will remain until +03:05 after the scheduled time. The heart marker may not appear due to completing a mission between appointment reminder times (the first is -03:00 hours ahead of the scheduled time, the second is -02:00 hours, and the last is -00:30 minutes), but pay no attention to this as it has zero effect on anything other than requiring you to place a marker. If you're not in a mission when a reminder happens, then the heart marker will appear.

Example (for an 18:00 date): If you arrive at the diner before 15:00, nothing will happen. If you stand at the diner until 15:00, the mission will be begin the moment the clock strikes 15:00, and you'll be told French Tom hasn't arrived. This means once you enter the diner, you'll have to sit through a 20 second cutscene before you're able to stand up and kill him.

If you arrive at the diner between 15:00 - 21:05, he will have arrived and you won't have to deal with the cutscene UNLESS you approach the table. If you shoot him from the doorway, you can complete the mission, but there's a chance you'll gain a wanted level. You'll never get a wanted level if you kill him with the knife or bat, but you'll trigger the cutscene if you get close enough to use these weapons.

WARNING! (still using an 18:00 date as an example) Don't screw yourself with a taxi warp time progression in relation to taxiing to the diner. If your taxi warp time progression crosses you into the 15:00 hour, you'll be told French Tom has yet to arrive and you'll have to sit through the cutscene.

Example: Time reaches 14:55, heart marker (date) hasn't appeared, cab to a marker at the diner (the time is 14:57 before cabbing), time has progressed to 15:27 upon arriving, you're told French Tom hasn't arrived.

-Missing the date- (starting with an 18:00 date)

Once the clock reaches 21:06, you're told you've missed the date. You automatically call Brucie 10 seconds later to inform him. 30 seconds later, you'll get a text from French Tom which sets up a new date for 00:00 (2 1/2 hours later). This date's window is 21:00 - 03:05.

If you miss the midnight date, the same exact scenario plays out. A new date will be set up for 08:00 (~5 hours later). This date's window is 05:00 - 11:05.

If you miss the 08:00 date, the next date will be set for 18:00 and it will continue to loop like this until you complete the date.

"Paper Trail" (nothing new here, basically what Dispersor's Classic% info page says)

After completing "Dust Off", wait 11 hours and you'll get a call from UL Paper which triggers "Paper Trail".

You cannot call UL Paper to trigger this mission. If you miss the call, you cannot call UL Paper back to trigger it. You must wait for them to call you back which should happen in one or two call cycles.

After completing Hostile Negotiation, Roman's text thanking you for saving him is unlocked after 45 in-game minutes have passed.

Roman's call letting you know about the new penthouse in Algonquin is unlocked after 30 in-game minutes have passed after getting the text above.

Dimitri's call is unlocked after 30 in-game minutes have passed after getting the call from Roman about the penthouse. The call begins with, "Niko, it's Dimitri."

See this post for HN: http://www.speedrun.com/gtaiv/thread/0n7fv/1#he7lt

After unlocking 'Ransom' (where you take a photo of Gracie):

If Ray ISN'T dead:

The next step to unlocking 'She's a Keeper' is to get Ray's call after finishing 'Ransom'. Ray's call comes in after an hour and a half (1h 30m) of in-game time passes. His call begins with, "Nicky, I hear you and the Irish have got your hands on Ancelotti's daughter."

After getting Ray's call, you need to wait an hour and twenty minutes (1h 20m) of in-game time for Packie to send you the text message which unlocks 'She's a Keeper'. Be aware that this text message will NOT come in during Packie's unavailability hours (06:00-15:00).

If Ray IS dead (or will be dead before getting his above call):

After you've taken the photo and walked out of the room, you need to wait two hours and fifteen minutes (2h 15m) of in-game time for Packie to send you the text message which unlocks 'She's a Keeper'. Be aware that this text message will NOT come in during Packie's unavailability hours (06:00-15:00).

I've updated the post about "Ransom", three posts above, regarding what will happen if Ray is dead.

I've updated the post about "Out Of The Closet Part 2". A lot has been corrected/added.