Oh man, doing some serious dusting off of the old rpg notes . . .
First thing to know, this was in a game that took place in the world of the Matrix movies. Yeah, total nerdgasm, but it was the spirit of the times and I freakin loved that game. Made my own system for it adapting AEG's d10 dice system. But I digress.
The heist itself was actually a simulation outside the matrix, a teaching program designed to have newly liberated hackers get used to jacking in, gathering intel, planning a mission, then executing it. So they actually got multiple tries and multiple failures, learning from their mistakes each time.
Once the guns came out and bodies started hitting the floor, a timer started counting down until Agents arrived. So they had to accomplish most (or all!) of the heist covertly, without setting off alarms and such, but blasting their way out at the very end was an option.
I really don't remember all the specifics, but I know that they had to hack in to get the blueprints and employee info, including schedules and personal info. Then they sabotaged a few of the guards while they were at home (food poisoning) so that the guards that were on shift during the heist were pulling double shifts, were exhausted, and didn't know the normal routine very well.
Then they split into three groups, which is normally bad, but each of those three groups had something important to do at every stage of the operation, so in practice we just played like they were together, with everyone on the same initiative track, going about their jobs simultaneously.
One group went to the top of the building and hacked security.
One group ambushed an armored car that was on the way to the building, quietly, and donned their uniforms.
One group went into the bank itself and got ready to be the distraction.
Once the armored car guys arrived, they went about their normal business of going in to deliver some cash. The distraction-guy was already at the teller, making some noise about being foreclosed on or something, I forget, and drawing the attention of some of the managers. The guards on duty normally would have recognized that the armored car guys weren't the right people, but of course they weren't used to this shift and didn't know better.
The hacker hacked stuff and shut off the panic buttons, which meant that they now had 10 minutes to finish the heist; if the panic buttons didn't send out an "all clear" signal every 10 minutes, the cops were automatically notified.
Then the distraction in the bank faked getting violently mad, and "overpowered" one of the armored car guard PCs. He obviously threw the fight and gave the other his weapon. The now bank robber forced the bank people to let him into the safety deposit vault.
At this point the PCs needed to get into the inner vault, which held the info that was the entire objective of the operation in the first place. But only the bank manager had the passcodes to get in, and he could enter in a false passcode that would destroy the vault's contents, so pure coercion wouldn't work. So they had to trick him.
They did that by having the fake guard come running out of the security deposit vault, yelling that the robber had gotten in to the inner vault. When they rushed in to see, they found that the robber was, indeed, gone from a room with only one entrance, and he couldn't have left without everyone seeing! In actuality, he had used a hardline to exit the simulation out of everyone's line of sight.
When they looked at the security feed from inside the inner vault, they saw the hacker's fake feed showing the robber inside.
Convinced now that inner vault security had been breached, the bank manager entered in the proper passcode to open the vault door. Then the PCs had no further use for him, so they knocked him out.
With the heist accomplished the PCs had been planning on leaving through the same hardline, but it just so happened that the cops had noticed by now that the "all-clear" signal was overdue, and had severed their phone lines. Cut off and quickly surrounded by cops, the party had to blast their way out, aided by their last companion who redialed back into the simulation a few blocks away with a sniper rifle, then took up position nearby and covered their escape.
There was a fight scene, and a car chase, and plenty of wire-fu. They all got out at the last second, when an Agent had just shown up and was about to ruin their day. I think the phone they found was in a public library, and the Agent shot up the whole place and killed many an innocent book that day in pursuit.
Good times, man. Teenage me really, really loved that game! Hope some of that loooooong post helps!