This is an Old School horizontal scroller 'Shoot Them All' game in bash.
With multiplayer modes team and duel. You have to defeat 100 aliens to fight with Boss.
I'm using netcat for client-server exchange in multiplayer mode.
So netcat have to be installed on system if you wish to play with friend.
Terminals on both hosts have to be with equal dimensions.
Read about it here.
On ubuntu 18.04 you can install it with apt!)
sudo apt install -y piu-piu