Realtime space co-op
Starline Defense Co-Op
A rebuilt arcade shooter with instant squad rooms, invite links, a shared survival run, online wingmates, and a smoother command deck for both desktop and touch play.
Use a simple callsign so your wingmate knows who joined.
Hosting creates a room code right away. Joining works with a code or shared link.
Boost, revive, pick up overdrives, and hold the line through escalating waves.
Invite link
Host once, then copy this link or room code and send it to a friend.
Arcade Lounge
Open the lounge in a new tab or post this squad room there so another pilot can jump in quickly.
Advanced connection settings
Host a squad to generate an invite, join a friend by code, or practice with the AI wingmate in solo mode.
What changed
Better run flow
The same websocket backend now powers chess, backgammon, and this co-op shooter, so hosting and invites feel consistent everywhere.
Waves escalate, pilots level up mid-run, boss dreadnoughts arrive on milestone waves, and downed teammates can come back if someone keeps the run alive.
Desktop uses mouse aim plus keys. Touch devices get a move stick, an aim pad that fires while held, and a separate boost trigger.
Room
-
Wave
Wave 1
Squad score
0
Condition
Stand by
Mission feed
Spin up a room and launch the squad.
Objective
Survive the first surge and build squad momentum.
Squad level
Lv 1