🔔 Your activity
Friend requests and recent messages, all in one place.
💬 Chatrooms
Shared channels. Keep personal details private.
# general
Trivia showdown
Pass the phone or challenge friends to a quick quiz. No stakes, no downloads.
Ready to play?
10 questions · mixed topics
♧ Friends
Add people, accept requests, and jump into a conversation.
Add a friend
✉ Messages
Friends-only conversations with replies, reactions, pins and typing indicators.
Choose a friend to start chatting.
◈ Groups
Create a hangout, join a group and chat together.
Create a group
Blackjack
Try to reach 21 without going over. Play solo or challenge a friend. No betting, chips or real money.
Solo practice
Online with a friend
Both players take turns against the same dealer. Moves sync automatically.
🏆 Mini Tournaments
Four players. Two semifinals. One final. Play Tic-Tac-Toe or Connect Four and crown a winner.
Create a tournament
Online multiplayer
Challenge another member to Tic-Tac-Toe or Connect Four. Moves appear automatically while you play.
Built-in arcade
Your pocket arcade, ready whenever you are.
Play Snake with arrow keys or WASD. Your score stays on your device until server-verified scores are available.
Memory match
Flip pairs of symbols and match them all in as few moves as possible.
Reaction challenge
Wait for the signal, then click as quickly as you can.
2048
Use the arrow keys. Reach 2048!
XP & leaderboards
Arcade high scores
Community feed
👑 Owner dashboard
Only Henoi can access this dashboard.
Pixel pets
Your theme
Change how Underground+ looks on this device.
Saved locally in this browser.
Listening lounge
Share a music link with friends. Playback happens on the provider site; synchronized playback is not available yet.
⌨ Secret terminal
UNDERGROUND OS 1.0\nType help to begin.