its obvious hiiro and ravencroft and the other friends are doing it to get on your nerves.
I wasn't trying to get on anyone's nerves, but now that you're acting like a child...
There are not spoilers here:
There are three alternate endings you choose from. Devin comes to your house and prevents Franklin with the option to A: Kill Trevor B: Kill Michael or C: Deathwish:
In option A, you meet up with Trevor where he tries to convince Franklin to assassinate Michael. Franklin then proceeds to pull a gun on Trevor and he drives away in his truck. Franklin chases him down and broadsides Trevor's truck right into a tanker full of toxic waste. Franklin shoots the waste to ignite it and kill Trevor.
In option B, Franklin calls Michael to set up a "meeting." He proceeds to call Trevor for some help, but he wanted no part in it. After chasing Michael around for a while, Micahel ends up at the top of a very tall power plant full of winding staircases. Michael nearly falls from the tower and that's where Franklin is presented with the option to drop or save Michael. Michael still falls to his death even if you want to save him.
In option C, Franklin calls Trevor and Michael to meet up and have one massive showdown against the government and Merryweather at a large foundry. Franklin brings Lamar as backup. After taking out all the enemies, they regroup and make a master plan to kill Stretch, Agent Haines and Mr Cheng and his gang. Trevor kills Haines on a Ferris wheel, Michael kills stretch and his gang at the basketball court and Franklin kills Mr. Cheng and the Triads at Pacific Bluffs beach. After performing those three tasks, you switch to Trevor and kidnap Devin after taking out a Merryweather team defending his house. Devin is thrown into a trunk and Trevor takes him out to the cliffs near Mt. Chiliad. Franklin and Michael meet up with him and they roll the car Devin is inside of down a cliff into deep water. This is where the three split up and go their separate ways.