YPM — Your PC Mine

⚠️ Project discontinued. Development of YPM has been completed and no further updates or features are planned.

A Fabric mod that lets you mess with your friends directly from a Minecraft server. Built for ARGs, horror maps, or just chaotic fun — you type a command, and something happens on their screen. Or their game. Or their PC.

⚠️ Must be installed on both server and client. Players without the mod will be kicked on join.

✨ What you can do

/ypm error <player> "Title" "Text" [freeze]

Pops a fake Windows error dialog on their screen. Add a freeze time to lock up their game first, then show it. Use | for line breaks.

/ypm errorspam <player> <count> "Title" "Text" [--random] [--minimize]

Floods their screen with fake error dialogs — up to 100 at once. Flags:

• --random — randomizes dialog positions across the screen
• --minimize — minimizes Minecraft before spawning the dialogs

  /ypm toast <player> "Title" "Text" [icon] [durationMs]

  Shows a real Windows system notification (toast) in the bottom-right corner. Icon options: Info (default), Warning, Error, None. Duration in milliseconds (1000–30000, default 5000).

/ypm msgbox <player> "Title" "Text" [buttons] [icon]

Opens a real Windows message box dialog. Button sets: OK (default), OKCancel, YesNo, YesNoCancel, RetryCancel, AbortRetryIgnore. Icons: Info (default), Warning, Error, Question, None.

/ypm freeze <player> <time>

Freezes their game completely for a set time (e.g. 10s, 2m). Nothing works — no clicking, no moving, nothing.

/ypm windowshake <player> <time> <strength 1-10> [--noise] [--fullwindowed] [--restore]

Shakes their Minecraft window. Strength from 1 to 10. Optional flags:

• --noise — random jerky movement instead of smooth waves
• --fullwindowed — stretches to fullscreen before shaking
• --restore — puts the window back where it was after

  /ypm colorbars <player> <time> [type] [--tone] [--label <corner> "text"]

  Covers their screen with broadcast-style color bars. Types: smpte (default), hd, ebu, pluge, mono, rgb. Flags:

• --tone — plays a 1kHz test tone for the duration
• --label <corner> "text" — shows text in a corner (tl, tr, bl, br); supports & color codes

  /ypm invert <player> <time>

  Inverts all colors on their screen for the given time (e.g. 5s, 1m).

/ypm syssound <player> <sound>

Plays a Windows system sound on their PC with no visual. Options: Hand, Asterisk, Beep, Exclamation, Question.

/ypm overlaytext <player> <time> <size 1-5|rdm> <scaleX|rdm> <scaleY|rdm> <color> "text" [--random] [--sound] [--mctext]

Renders text directly on their screen, over the game. Size from 1 (tiny) to 5 (huge), or rdm for random. Scale X/Y control stretch — rdm randomly squeezes one axis and stretches the other. Flags:

• --random — places the text at a random position on screen
• --sound — plays a low tone when the text appears
• --mctext — uses the vanilla Minecraft font instead of the mod's font Supports & color codes (&4, &c, etc.) and formatting codes (&l bold, &o italic, &n underline, &m strikethrough, &k obfuscated, &r reset) anywhere in the text. Use | for line breaks.

/ypm overlayspam <player> <count> <time> <size> <scaleX> <scaleY> <color> "text" [--random] [--sound]

Sends the overlay text repeatedly — <count> times with 100ms between each flash.

/ypm console <player> <time> <color> "text" [--screamer [<vol> [<seconds>]]] [--mctext]

Blacks out their entire screen and types the text line-by-line like a terminal. Lines appear one at a time, looping until time runs out. Use | to separate lines. Flags:

• --screamer — plays a scream sound when it appears. Optional: <vol> (0.0–1.0) and <seconds> for how long the sound lasts
• --mctext — uses vanilla Minecraft font Supports & color and formatting codes.

/ypm screamer <player> [<volume>] [<duration>]

Plays a raw scream sound directly on their client with no visual. Volume 0.0–1.0, duration in s/m format.

/ypm web <player> <url>

Opens a URL in their browser. While they're playing.

/ypm txt <player> "filename" "text"

Creates and opens a .txt file in Notepad with whatever you want it to say. Use | for line breaks.

/ypm minimize <player>

Minimizes their Minecraft window. Poof.

/ypm shutdown <player>

Shuts down their PC.

/ypm reboot <player>

Reboots their PC.

/ypm chat <player> "text" [--send] [--perspective]

Opens their chat and types text as if it's them. Flags:

• --send — sends the message automatically
• --perspective — switches their camera view while typing

  /ypm perspective <player>

  Switches their camera between first and third person.

/ypm disclaimer <player>

Shows the YPM disclaimer screen to the player.

🔁 Interactive overlay — /ypmutil

/ypmutil overlaytext <overlay_to> <time> <size> <scaleX> <scaleY> <color> [chat_from] [--random] [--sound] [--mctext]

Starts an interactive overlay session. Whatever the designated player (chat_from, or the command executor by default) types in chat gets sent live as overlay text to overlay_to — instead of being posted in chat. Supports player names, comma-separated lists, or r<N> for radius (e.g. r20 = all players within 20 blocks).

Useful for ARGs where a "system" character types messages that appear directly on someone's screen in real time.

/ypmutil stop [<player>]

Ends the active overlay session. Without an argument, stops your own session.

🛡️ Player protection — /ypmconfig

Players can restrict what the operator is allowed to do on their machine:

/ypmconfig canopenweb <true|false>

Block the operator from opening URLs in the browser. When blocked, a fake browser window appears inside the game instead.

/ypmconfig canshutdown <true|false>

Block shutdown and reboot commands. When blocked, a fake shutdown/reboot screen appears inside the game — the PC is not touched.

/ypmconfig enablesafemode <true|false>

Enable Safe Mode — the most complete protection. All out-of-game actions (browser, Notepad, shutdown) are fully simulated inside Minecraft. Nothing reaches the real OS.

Running /ypmconfig with no arguments shows your current settings.

📡 Operator feedback

When you run any /ypm command, the server tells you the mode each player is in:

[YPM] Error sent to 3 player(s) | Normal: 2, SafeMode: 1

So if you're running an ARG with a group, you always know who gets the real effect and who is in safe mode.

🎭 Made for ARGs, horror maps, and pranks between friends on private servers. Please don't be evil.