Can You Play Machine Party Solo or Offline?

✗

No. You cannot play Machine Party alone in the official game. There is no single-player mode, no official bots, and no way to start a match with one person. The game is built as a 2-4 player party experience. That has not changed after v2.0. What is available: Online private rooms (2-4 people), and Local couch co-op on one PC since the v2.0 update (you still need at least two human players on that machine).

Your Four Options

Friends on other PCs

Online private room

Use this if people already own the game. Host creates a room, shares the numeric ID, guests paste it in Join Room.

Friends in the same room

Local couch co-op

Closest thing to "offline." Same screen, same machine, no remote players. Need extra controllers or 3 pads plus keyboard.

Nobody to play with

LFG Discord

Use the official Looking For Group Discord the developers pointed players to. Do not wait for in-game matchmaking, it is not part of the design.

Want to practice alone

Unofficial bot mods only

Community mods on Nexus advertise AI bots (up to 3). Not official, can break after patches. Treat as a last resort, not the intended game.

APlay Online With Friends

1
Everyone updates Steam and launches the same current build.
Version mismatch is the number one join failure people report.
2
Host: Steam must be online. Open the game and create a private room.
3
Wait until the lobby shows the long numeric room ID.
Copy the full number. Do not screenshot and guess digits.
4
Send that ID in Discord or Steam chat.
Guests: Join Room, paste the ID with no spaces.
5
Optional: host can try Shift + Tab Steam overlay invite.
If the invite button is missing, use the room ID. That is the reliable method.
6
Voice chat is not built in. Use Steam voice or Discord.
Several minigames depend on talking and lying.

If someone cannot join: Host leaves and creates a new room (old IDs die), everyone verifies files in Steam, and one guest tests before the whole group retries.

BCouch Co-op on One PC (Local)

This is what "offline" actually means in community talk: same screen, same machine, no remote players. You do not need a second copy or a second PC.

1
Plug in controllers before launching the game.
Close other input mappers.
2
Launch Machine Party. Go to Local.
3
Choose Original, Custom, or Arcade.
4
In the lobby, each extra player presses any button on their pad to join.
5
One person can stay on keyboard and mouse.
Four players means 3 controllers plus keyboard.
6
Each joined player types a name and picks cosmetics, then ready.
A 5-second countdown starts when everyone is ready. Changing the lobby cancels it.

Steam still launches the game. If Steam itself is fully offline you may not start the title. The session does not need other PCs on the internet, but Steam needs to run.

CYou Bought It and Have Nobody

This is the actual bottleneck, not a hidden solo menu.

1
Open the pinned Steam discussion that links the official LFG Discord.
Developers added this in the v1.5 notes because they will not ship public matchmaking.
2
Post region, time, and language. Ask for 2-4 players.
3
Host creates a private room and shares the room ID in Discord.
Do not use a random public code that goes stale.
4
Do a 2-person test first, then fill to 4.

Common Mistakes to Avoid

✗
Assuming Local with one controller means solo. The lobby will not start a real session with one person.
✗
Posting room IDs publicly and expecting them to stay valid. Host crash, leave, or new lobby means a dead ID.
✗
Mixing game versions after an update. Version mismatch is the top join failure.
✗
Expecting built-in voice or a server browser in vanilla. Those exist only as community mods, not in the base game.
✗
Buying a second copy for couch play. You do not need it for Local. One copy, one PC, multiple controllers.

Your Four Options

APlay Online With Friends

BCouch Co-op on One PC (Local)

CYou Bought It and Have Nobody

Common Mistakes to Avoid

More Machine Party Guides