They Are Billions: The Prison
The Prison - another tactical mission in They Are Billions. As in the case of the previous stages, here, you will only control the hero selected at the beginning of the game. However, during the mission, there are several Lucifer for you to rescue, the presence of which will greatly facilitate the further course of the mission. In this chapter you will find the walkthrough guide and tips related to the Prison mission in story mode.
How to unlock and goals
How to unlock: unlocked after completing The Valley of Death
Mission objective:
- Get the object of the mission: Mission artifact.
- The hero must get out of the fortress alive.
- (optional) Get valuable items for the Empire (points: 260).
- (optional) Get ancient technology (scores: 520).
Note - as part of tactical missions, additional items to collect are scattered randomly at the start of the mission. For this reason, this section does not contain information about their location - because it is just random.
The mission

- Once the mission starts, ignore the main entrance to the prison - it is locked. Instead, explore the right edge of the map - there, after dealing with a small group of enemies, you will find Grenades.
- Now follow the path leading along the left edge of the map. Collect the first aid kit hidden in the bushes, and run through a hole in the wall inside prison.
- Clear the prison premises of the enemies and collect all the items here - it will give you a lot of Empire and Science Points.
- Go through the entrance, located in the North-Eastern part of the room, and then continue along the path to the south-east. There, at the end of the road, you will find the two Lucifer units mentioned above.

- Now go to the northern part of the building - there you will find a hole in the wall. Go through it and turn continue westward. You will go back to prison and in the next room you will find the artifact of the mission.
- Collect the artifact and go back - as usual, you need to return to the place where the mission started. If you want to get extra Empire or Science Points, you should consider exploring the map in more detail - Lucifer units might prove useful for that.
Tips

Finally, a few tips to help you complete the prison mission, namely:
- Find and save two Lucifer units - the exact path to this goal is described in the previous paragraph. These units do a great job in enclosed spaces full of hordes of infected.
- It is worth using the fact that you will have Lucifer units at your disposal to explore the entire map. Clearing it of the infected won't take long, and will earn tons of extra Empire and Science Points.
- Because of the construction of the prison - full of narrow corridors - you need to stay vigilant all the time. Be careful not to drive yourself into a trap and get surrounded by the infected - in such a situation, the hero will be quickly killed.
- They Are Billions Guide
- They Are Billions: Campaign walkthrough guide
- They Are Billions: The New Empire campaign
- They Are Billions: Story campaign - a few words of introduction to They Are Billions walkthrough
- They Are Billions: Mission 01 - The Hidden Valley
- They Are Billions: Mission 02 - The Last Bunker
- They Are Billions: Mission 03 - The hunter's Meadow
- They Are Billions: Mission 04 - The Crossroads
- They Are Billions: Mission 05 - Alpha Communications Center
- They Are Billions: Mission 06 - The Weapons Factory
- They Are Billions: Infected Swarm #1
- They Are Billions: Infected Swarm #2
- They Are Billions: Infected Swarm #3
- They Are Billions: Mission 07 - The Coast of Bones
- They Are Billions: Infected Swarm #4
- They Are Billions: Mission 08 - The Narrow Pass
- They Are Billions: Mission 09 - The Mines of the Raven
- They Are Billions: Mission 10 - The Lands of the Giant
- They Are Billions: Mission 11 - Cape Storm
- They Are Billions: Infected Swarm #5
- They Are Billions: Hydra Power Plant
- They Are Billions: Mission 12 - The Frozen Lake
- They Are Billions: The Foundry
- They Are Billions: Mission 13 - The Lowlands
- They Are Billions: Gamma Medical Center
- They Are Billions: The Nest of the Harpy
- They Are Billions: The Lonely Forest
- They Are Billions: The Oasis
- They Are Billions: Infected Swarm #6
- They Are Billions: Infected Swarm #7
- They Are Billions: Infected Swarm #8
- They Are Billions: Infected Swarm #9
- They Are Billions: The Prison
- They Are Billions: Steel Fortress
- They Are Billions: The Valley of Death
- They Are Billions: Omnicron Laboratory
- They Are Billions: The Noxious Swamp mission
- They Are Billions: Infected Swarm #10
- They Are Billions: Infected Swarm #11
- They Are Billions: The Villa of Terror mission
- They Are Billions: The Resistance
- They Are Billions: The Broken Land
- They Are Billions: The Forbidden Forest
- They Are Billions: Infected Swarm #12
- They Are Billions: The Wasteland of the Giants
- They Are Billions: The Phoenix Project
- They Are Billions: Infected Swarm #13
- They Are Billions: Infected Swarm #14
- They Are Billions: The Highlands
- They Are Billions: Infected Swarm #15
- They Are Billions: The Goddess of Destiny
- They Are Billions: El Dorado Mission
- They Are Billions: The New Empire campaign
- They Are Billions: Campaign walkthrough guide
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