Expeditions refer to the different game modes within Pressure, the submarines leading to each expedition being found in the Submarine Bay.
There are currently 4 expeditions available, with one more planned [1].
The Expendable Protocol expedition serves as the main game mode of Pressure, containing the main story, characters and taking place in the Hadal Blacksite. There are currently at least 1099 rooms[2] within this expedition.
The Expendable Protocol forces you to traverse through 115 rooms, surviving a Grand Encounters, 15 rooms of near darkness at the end, and finally the Ending Encounter, all to obtain Z-2, the crystal responsible for powering the facility. There is currently 1 Grand Encounter and 1 Ending Encounter within this expedition, both against the Searchlights.
Both Monsters and Characters appear within the Hadal Blacksite, with Monsters being escaped anomalies roaming around the facility, and Characters being individuals you encounter, who have fully fleshed out lore and personalities. In the Expendable Protocol, you encounter:
Node Monsters follow a series of nodes in a room, killing anything in their path.
Hostile monsters work to attack you throughout your gameplay, some only being triggered by certain actions.
These monsters are not an active threat to the player.
Characters do not typically attack the player, and instead serve some kind of story purpose.
The Endless Expedition is one of the extra game modes that provides an endless version of the main expedition, with no goal in mind other than getting to the highest amount of rooms possible without dying to a monster. The Endless Expedition has the same amount of rooms as the main expedition, however provides a "new" room type, this being a lit up version of The Ridge, not locked behind having to collect Z-2.
The Endless Expedition is the only non-canon expedition available, with the events of the expedition not occurring in the main story.
Grand Encounters are still able to spawn in the Endless Expedition, however Final Encounters are unavailable, as the Endless Expedition does not have an end.
The Endless Expedition has a very similar cast of Monsters and Characters, with the only key differences being the absence of Sebastian Solace aside from dying, and the addition of Harbinger.
Node Monsters follow a series of nodes in a room, killing anything in their path.
Hostile monsters work to attack you throughout your gameplay, some only being triggered by certain actions.
These monsters are not an active threat to the player.
Characters do not typically attack the player, and instead serve some kind of story purpose.
The Raveyard is another expedition considered extra content. The Raveyard was designed for The Haunt, a Roblox event hosted during October, however it became its own thing after it was revealed 3 days before The Haunt that it was a costume contest, unlike the other events. The Raveyard takes place in a completely unique location, not within the Hadal Blacksite. There are 73 unique rooms[3] in the Raveyard, with the player having to traverse 40 of them to reach their goal.
The Raveyard follows the player controlling a new Expendable, tasked with shutting down an anomalous party, hosted by an entity known as DJ Skeletunes, happening within the ████████ Graveyard. The Expendable must traverse through the main graveyard, the crypts, and finally up to the bell tower in order to stop the party for that year.
While there are not Grand or Final Encounters, you are constantly chased by the monsters in this expedition, unlike in the main expedition where threats show up per room.
The Raveyard has a new cast of characters and monsters, with only the Candlebearers making it to the main expedition.
Hostile monsters work to attack you throughout your gameplay, some only being triggered by certain actions.
Characters do not typically attack the player, and instead serve some kind of story purpose.
The Hunted is the newest expedition, and featured in The Hunt: Mega Edition as a source for collecting a Regular Token and the 3rd Mega Token. The Hunted takes place before the events of the main expedition, putting the player in the shoes of an MR-P this time around. The Hunted has 144 rooms[4] in total, 74 rooms taking place in The Outskirts, and 70 within the Mantle Extraction area.
The main part of the expedition takes place in The Outskirts, with the MR-P being tasked with creating a staging point for the Expendable Protocol, which is also the main expedition. The MR-P is, canonically, successful with this task, allowing submarines to rise at Submarine Dock #13 to deliver Expendables.
The secondary part of the expedition involved using the Decoder in order to access a hidden location with a tram, leading the player to the Mantle Extraction area, where The Hosts force the player to participate in their game show in return for gaining access to The Vault, the gameshow involving surviving all the threats from the main part of the expedition, alongside harmful gas and magma leaks. Once completed, the player reaches The Vault, being able to take the Mega Token.
The Hunted has a small group of monsters, similar to The Raveyard, however, it makes up for this with the constant threat of The Crooked.
Hostile monsters work to attack you throughout your gameplay, some only being triggered by certain actions.
Characters do not typically attack the player, and instead serve some kind of story purpose.
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