DEEP SEA SUB
deepseasub.com
Slow-burn multiplayer strategy · now with Factions & Pacts

Trust nobody.Rule the deep.

Deep Sea Sub is an asynchronous multiplayer strategy game about scarce Action Points, hidden intentions, diplomacy, betrayal and survival. Move carefully. Hoard power. Form secret Factions. Commit to a single binding Pact. Make alliances — and break them when the timing is right.

See how it plays
⏱Play over days or weeks
⚡Secret AP economy
💬Diplomacy is a weapon
🤝Secret Factions & Pacts
BLACKWATER TRENCH · DAY 7
Classic
Your submarine
HULL♥♥○
AP4
SONAR3
STATUSLIVE
↗ MOVE 1 AP
◎ FIRE 1 AP
⇄ TRANSFER
SECTOR CHART
MA
YOU
IR
Commanders
Frederik♥♥
Mara♥♥♥
Iris♥♥
PelicanJURY
💥 Oskar attacked Mara.
⚓ Iris moved east.
💬 2 private messages.
WELCOME BACK, CAPTAIN
5 updates
Since you were away

The deep kept moving.

⚡+1 AP received.
💥Oskar attacked Iris.
☠Pelican joined the Jury.
💬2 new diplomacy messages.
Why Deep Sea Sub works

Simple rules. Complicated people.

The board is intentionally understandable. The depth comes from what the other captains might be planning when you are not looking.

⚡

Scarce Action Points

AP arrives slowly and stays private. Spend it now, or quietly accumulate enough power to change the board later.

📡

Position & Sonar Range

Movement, attacks and transfers depend on range. Every sector you occupy affects who you can threaten — and who you can help.

💬

Diplomacy is gameplay

Room chat, private comms and secret coordination create alliances, deals, threats and misinformation. Words can be more valuable than AP.

⚖

Death is not the end

Eliminated captains join the Jury and can continue influencing the living. Revenge can outlive your submarine.

🤝

Factions & Pacts

Create hidden Factions with select captains and coordinate through binding Pacts. You can conspire in many groups — but only commit to one unresolved Pact at a time.

📱

Made for asynchronous play

Check in for a few minutes, make your move, negotiate, then leave. The match continues over days or weeks on desktop, tablet or phone.

The tactical board

Every square changes the conversation.

Your submarine lives on a shared sector chart. Move to create pressure, enter range to attack, position yourself to trade resources, and watch the map change as alliances form and collapse.

✓
Large, readable tactical mapSonar range, legal movement and targets are shown visually.
✓
Server-authoritative actionsThe server validates AP, range, position and game state.
✓
Secrets stay secretOther players never receive your private AP balance in their client state.
BLACKWATER TRENCH · SECTOR CHART5 alive
The social game

Make promises the map cannot see.

Deep Sea Sub is not just about where you move. It is about what you tell everyone before you move there. Public comms, private diplomacy, transfers and the Jury keep the political game running beside the tactical one.

✓
Public room commsMake declarations, bluff, threaten or coordinate openly.
✓
Private diplomacyNegotiate directly with another captain without exposing the conversation.
✓
The JuryDeath changes your role instead of removing you from the match.
DIPLOMACY & JURYPolitical layer
New feature

Secret Factions. Binding Pacts.

Factions are hidden group chats for selected captains. Inside them, players can propose a Pact: one ordered covert operation where each signer commits exactly one action. You may belong to multiple Factions, but only one unresolved Pact at a time.

✓
Invisible diplomacyNo one outside the Faction knows the channel exists.
✓
One action per signerPacts stay readable, tense and strategic instead of becoming automation scripts.
✓
Break your word — publicly only by outcomeIf the first signer takes a different action, the Pact becomes void and the conspirators know exactly who broke it.
FACTIONS & PACTSCovert ops
Choose the pace

Three ways to enter the deep.

Use a preset for fast setup, or build a custom ruleset in the Captain's Lounge.

Recommended
⚓

Classic

The standard Deep Sea Sub experience for everyday online play.

Starting AP1
AP grantDaily
Hearts / Range3 / 2
Factions & PactsEnabled
Jury & RevivalEnabled
🗂

Office

The slower original-inspired rhythm, where patience and workplace-style politics become part of the strategy.

Starting AP0
AP grantWeekdays
Grant timeRandom window
Factions & PactsEnabled
Jury & RevivalEnabled
🛠

Custom

Build a room around your group, tournament or experimental rules.

Starting APConfigurable
AP scheduleConfigurable
Faction Size Limit2 – 8
Pact Step Delay0s – 24h
Jury / RevivalOptional
A match in four beats

Easy to learn. Hard to trust.

The core game loop is intentionally small so the social strategy can become large.

1

Join a room

Enter a public room, accept a private invite, or create your own Classic, Office or Custom game.

2

Receive AP

AP arrives according to the room schedule. Your balance remains hidden from every other captain.

3

Act or wait

Move, attack, repair, extend range, trade resources — or spend nothing and keep everyone guessing.

4

Survive the politics

Negotiate, betray, die, vote, revive and continue until a final victor or negotiated truce emerges.

Your first move can wait. Your first alliance cannot.

Enter the Captain's Lounge, find an open operation, invite your crew or create a new game in under a minute.