- Build a Dungeon multiplayer centers on dungeon raids, guilds, and shared server play.
- Server size is 6, so each server hosts a small group of rival dungeon masters.
- Dungeon Raids let you attack rival dungeons and steal progress rewards.
- Guilds add shared goals and group rewards on top of solo progression.
- Prepare a raid layout separately, because farming layouts rarely survive raids.
How Multiplayer Works in Build a Dungeon
Build a Dungeon is an online Roblox simulation from Exploration Guild, currently in Beta, where every player builds a dungeon, places monsters, and defends against invading heroes. Multiplayer is woven into that loop rather than being a separate mode: you share a server with up to 6 players, you can raid rival dungeons, and guild features tie individual progression into group rewards. Since launch in late September 2026, the game has passed 246.9K+ visits with roughly 1,356 active players online, so matchmaking and raid targets stay plentiful.
Servers hold only 6 players. If you want to raid friends or compare dungeons, join the same server first, since raid targets generally come from your active server pool.
The table below summarizes the multiplayer touchpoints:
| Multiplayer Feature | What It Does | When It Matters |
|---|---|---|
| Shared servers | Up to 6 players per server | Meeting rivals, social play |
| Dungeon Raids | Attack other players' dungeons for rewards | Mid-to-late progression |
| Guilds | Shared goals and group rewards | Event periods, long-term play |
| Hero defense | Your layout defends while you are offline | Always active |
Dungeon Raids: Attacking Rival Dungeons
Raids are the main competitive multiplayer system. Instead of defending your own route, you breach another player's dungeon, and success depends on preparation rather than raw stats.
Layered Assault
- Break control zones first
- Save burst for chokepoints
- Expect traps near objectives
Target Selection
- Pick dungeons near your power level
- Avoid maxed late-game fortresses early
- Repeat profitable targets
Reward Reinvestment
- Put raid loot into your weakest section
- Upgrade defense after each raid
- Keep a coin reserve for repairs
A standard AFK farming route usually collapses under raid pressure. Before raiding seriously, build layered defenses with separated control, damage, and finishing zones, otherwise rivals will carve through a single-room defense.
Follow these steps for a reliable raid routine:
Scout the target
Check the rival dungeon's apparent depth, monster density, and route length. Deep, looping layouts with stacked traps cost more to breach than compact ones.
Build raid counter-units
Prioritize units that handle grouped defenders and control effects. High-wave specialists outperform budget monsters in raid content.
Breach in layers
Slow or disable the first defensive line, deal damage in the middle section, and keep your strongest attackers for the final defense zone.
Collect and reinvest
Take raid rewards and immediately funnel them into the weakest section of your own dungeon, because revenge raids are common.
Defending Against Player Attacks
Your dungeon is your multiplayer shield. Whether heroes or rival players press the attack, the same layered principles apply.
| Defense Layer | Role | Upgrade Priority |
|---|---|---|
| Entrance control | Slow and weaken incoming attackers | ★★★★ |
| Frontline monsters | Absorb first impact, protect backline | ★★★★★ |
| Trap clusters | Extend time inside damage zones | ★★★★ |
| Final defense zone | Anchor with strongest monsters | ★★★★★ |
Run through this list after every raid or major update to keep your multiplayer defense sharp.
Raid Defense Audit:
- Entrance has at least one control effect
- Frontline monsters can survive extended invasions
- Traps overlap with monster attack ranges
- Final zone holds your strongest defenders
- Coin reserve covers emergency repairs
Guilds and Shared Progression
Guilds connect solo dungeon progression with group participation. Joining a guild that matches your activity level matters more than joining the largest one, because guild rewards usually scale with coordinated participation during events.
Complete guild objectives before low-value solo tasks when group rewards are active. Coordinated raid or event participation typically outpaces solo farming during guild events.
| Guild Activity | Solo Value | Group Value | Recommended Focus |
|---|---|---|---|
| Guild objectives | Medium | High | Do first during events |
| Coordinated raids | Medium | High | Share target intel |
| Event participation | Medium | Very high | Prioritize timed rewards |
| Solo farming | High | Low | Fill gaps between events |
Multiplayer Progression Roadmap
Multiplayer features unlock value gradually. Pushing raids or guild events before your economy is stable usually wastes resources, so sequence your progression.
| Stage | Multiplayer Focus | Main Risk to Avoid |
|---|---|---|
| Early | Learn servers, build first defense | Raiding with an unfinished dungeon |
| Mid | First raids on equal-level targets | Chasing maxed dungeons |
| Mid-late | Join an active guild | Ignoring guild event rewards |
| Late | Layered raid assaults, guild events | Outdated rooms draining resources |
Stabilize your core dungeon
Establish reliable clears and offline income before engaging in competitive multiplayer.
Build raid-specific counters
Add control and high-wave units that your farming layout does not need.
Raid at your level
Target dungeons close to your power level and reinvest every reward.
Coordinate with a guild
Sync event participation and share raid targets for group rewards.
FAQ
Q: Is Build a Dungeon multiplayer or solo?
It is both. The core loop of building and defending your dungeon plays solo with offline income, but Build a Dungeon multiplayer features include shared 6-player servers, Dungeon Raids against other players, and guild progression.
Q: How many players are in a Build a Dungeon server?
Each server holds up to 6 players. This small server size keeps rival dungeons visible and makes raid targeting more personal than in large-server games.
Q: Can my dungeon be attacked while I am offline?
Yes. Your dungeon defends itself with the monsters, traps, and layout you built, which is why layered defenses and a repair coin reserve matter even when you are away collecting offline income.
Q: Should I join a guild early?
Join when your basic economy and defense are stable. Guild rewards are most valuable during events, and an active guild matching your playtime outperforms a large inactive one.