here are some things i found quite a while ago, i hope other people will share stuff they find.

messing around with a side mission and doing taxi and vigilante at the same time, lead to some interesting things.

also, starting that stranger side mission and starting taxi at the same time means u can't get wasted or busted as long as you stay in the taxi you started it with.

This is a glitch that is already known of, one where you start a rampage, switch to the weapon you want, get in a car, cancel the rampage, and the gun of your choice will be able to be used inside of the car. Doing this with a chainsaw however, causes something pretty weird, idk if this has been done before, and also, this was recorded on real hardware.

You are able to kill anybody and everybody with the chainsaw from any distance, as long as it is on screen, and multiple people at a time.

Cool, this looks promising :)

Btw you managed to freeze the clock which can be useful in 100% category.

The glitch involving the rampage seems to work best with PSP as the Android version will just teleport you back. For example, starting Giorgo's side mission along with the taxi side mission will make it so that you'll be teleported back to Giorgio after cancelling taxi on Android. Not sure whether the same can be said about the DS and iOS version as I didn't test it on those platforms.

I've also tried starting Wilhelm's first encounter alongside Driven to Destruction but that only fixes the camera on Zhou Ming after the cutscene ends. Since getting busted or wasted are the only ways to fail Zhou Ming's mission, you'll be teleported to the hospital or police station. This in turn will immediately fail Wilhelm's side mission.

If someone could try the ambulance mission glitch on real hardware that would be nice. Doesn't work on android, or at least not that i know of.

Probably due to the fact that the Ambulance mission instantly fails if you leave the ambulance so it's impossible to start the mission if you're outside of the ambulance. Android - crash PSP (emulator) - crash

check the description for timestamps.

i did some testing and you can get out of the ambulance and still start it so you can use a faster four door car.

the timing on this is very weird however, hence why i only got it twice in this video out of multiple attempts.

This also works on the Android version but I have to use a garage to get it to work.

EDIT: Some notes; The vehicle you use doesn't stop when you deliver the patients to the hospital. Patients might have a hard time getting into certain vehicles You can only complete one wave before it fails you for not being in an ambulance Additional note: The timing is a lot easier with this method though not sure whether it'll save more time in the overall run since you need to go back to the garage to do it again, but you'll be able to use a much faster car than the ambulance. EDIT2: I've managed to find a way to not rely on the garage and start the ambulance mission without crashing while on foot. The timing is key, start the mission and exit the ambulance almost immediately after while holding the exit button.

Another random maybe useful thing.

If you die at the same time as starting a rampage you start the rampage at the hospital. Once you conplete the rampage you die again. And evrything is back to normal.

This occurs when I start Rampage with Taxi/Vigilante. Dying while still doing Taxi/Vigilante will teleport you to the hospital and starts the Rampage there.

while you guys test stuff with rampages, taxi/vigilante/ambulance, or any side mission, try seeing if your allowed to save, if you can save then you would be on mission 0, though im not sure if thats how it works in this game compared to others

You can't save since your not om0, you simply que them in a way.

I could do more thurough research in 5 days ish, on a computer.

oh yeah i know, im trying to figure out a way to get OM0 during some type of mission and i know that if you could save on a mission you would be OM0.

The crash with the ambulance glitch occurs because you leave at the same time starting, not because you start 2 missions at the same time. Missions, tattoo parlor, lottery shop vanish when starting a mission of any kind. So side missions and rampages are the only mission triggers we can work with at the moment if i'm not wrong.

Has anyone tried starting a side mission such as Taxi Driver at the same time as a story mission that you can start from within a vehicle? Even if it works it'd likely be frame-perfect but maybe someone can test it on emu using frame advance?

Okay, I've been playing around with the DS version and found you can start Taxi Missions while getting out of the car. After this, I found that you can start a rampage and taxi mission at the same time, by getting out of the taxi into a rampage marker and start the taxi mission. Unfortunately it won't let us manipulate om0. When you first do it, you get a black screen, but you can get out of it in a few ways. If you do nothing, the taxi mission will cancel like it normally does when you leave a taxi and then the rampage will start. If you reenter the taxi which you can do, the game will stay on a black screen until you cancel the taxi mission, after which the rampage will start. However, if you pause and unpause, the black screen goes away and you get visuals back. Unfortunately, all this reveals is that you're only on the taxi mission and not the rampage. The rampage will only start once you cancel the taxi missions. From this, it seems that it cannot have 2 unique mission types active at the same time and will instead queue them up.