HMP-Irongate is one of the maps present in the main game. It is styled after Alcatraz, a famous prison from the 1900's.
The prison holds 17 prisoners (yourself included), has 10 Guards, has an electric fence around the prison, and all guards carry special one-hit-kill weapons called 
Stun Rods.
Every cell includes a camera at the back wall, and only holds one inmate in each cell.
Note: HMP-Irongate is surrounded by water, forcing you to make a 
Makeshift Raft to fully escape.
Schedule
9:00-10:00 — Morning roll call.
10:00-11:00 — Breakfast.
11:00-14:00 — Leisure or Work period.
14:00-15:00 — Midday roll call.
15:00-16:00 — Afternoon free period.
16:00-17:00 — Exercise period.
17:00-18:00 — Dinner.
18:00-19:00 — Shower block.
19:00-20:00 — Evening roll call.
20:00-9:00 — Lights out.
Available jobs:
Janitor (default), mailman, woodshop, unloading, metalshop.
Strategies
Possible to quickly dig under desk and put it back before guard comes. It is a very slow process but will work eventually.
You also can use a Shaving Cream (or Tube of Toothpaste) to deactivate a camera for 30 seconds. It's very helpful if you want to check any desks or unscrew a vent without gaining Guard Heat.
If need be, You can simply give up, and try another prison. After all, We wont laugh at you if you cant handle it, you can train yourself in the easier prisons.
To Escape The player will need:
Guard Outfit Plastic Staff Key Grappling Hook Makeshift Raft A Cutting Tool Screwdriver Fake Vent Cover
How to Escape:
In their cell unscrew the Vent and use your desk to get up there. Find the Ladder Up on the Right side of the vent System. Climb up the ladder,Once you are on the roof jump off the Metal Ledge. Walk Right sticking to the fence follow the Road. Go past the bush near the Unloading Truck and follow the Fence. Use the Plastic Staff Key to open the door leading to the Entrance. Use the Plastic Staff Key again to open the door leading to a Building with crates and a Prisoner Stash. Go up the Ladder in the room to the roof and cross the metal ledge there. Cut the fence on the roof with the Prisoner Stash on the other side. Then use the Grappling Hook to Grapple over the Concrete Wall. Then walk towards the Prison Entrance,There you will find a red Dock. And Finally Use the Makeshift Raft at the end of the dock and you are FREE!!!