3D Bomber

Bomb or be bombed. When you die, your opponent scores a point and vice versa. When both of you die, neither scores. The first player to score 5 points, wins the match.
SINGLE PLAYER GAME
You will play against the computer. 3D Bomber wasn't really intended to be a single player game, so it's time to get a friend to play against.
A serial cable or modem would also come in handy.
MODEM GAME
You should see the modem being initialized. Afterwards, a prompt appears.
One of you should choose "Server" mode and the other must choose "Client" mode.
Unfortunately, in-game music has to be disabled during a serial game.
SERVER
Once "Server" mode has been activated, the game will wait for an incoming phone call. To abort the waiting, press Escape to return to DOS.
CLIENT
The "Client" will have to enter a telephone number. Just type the numbers and press Enter to dial. If you make a mistake or want to exit, press Escape while dialling. NOTE: While entering the phone number, you can't abort. To do so, just enter any phone number and press Escape while dialling.
KEYS
For movement, use the arrow keys.
The ALT key is used in combination with the left or right arrow keys for strafe.
The CTRL key drops a bomb.
Press T to type a sentence (up to 39 characters), press enter to send.
Escape quits.

What is abandonware ?