In Chapter Three of Serial Cleaners, the warden of Rikers Island hires Hal to clean up the aftermath of a riot before a state inspector arrives. Of course, it wouldn't be a Hal mission without causing a lot of extra chaos along the way; one of your objectives is to release the prisoners, causing yet another riot!
Related: Serial Cleaners: Yacht Mission Guide
The prison mission has some of the most aggressive enemies you've yet faced in the game, so chances are you'll need to bring Hal's strength to bear and bash a few heads before making your escape. Here's the best way to go about it.
Hal starts next to a prison bus that will be used to transport the bodies and evidence away, serving as the mission's main drop-off point. The main entrance is locked from the inside, so go to the right and go through the gate to find a side entrance. A guard will occasionally step out through the side door - let him see you, then slam the gate in his face to pick up the keycard he drops. Lock him in the dumpster by the side entrance, clean up the blood nearby, then head inside.
With the guard taken care of, you can use the keycard to open both cell block doors from the security room. There's also a body, blood, and evidence in the showers across the hall; clean it up, but be careful to avoid the guard patrolling inside. He's sure to hear your vacuum cleaner, but as long as you stay on the opposite side of the shower stalls he'll never see you.
With the cell block doors opened, you can now use the main entrance after dropping off the body instead of going around the side. Enter the main cell block and take a right to find a door to a back room; this also helps you avoid the guard patrolling near the cells. Chainsaw through the wooden wall
Read more on thegamer.com