Alien Intruder
This is a DOS game for i286 or later.
After investigating a mysterious transmission of unknown origin, the crew of a commercial spacecraft got captured by unidentified alien forms. It is up to you to rescue them and deal with the intruders.
In space no one can hear you scream, so use your blaster instead!
Alien Intruder is a single screen jump-and-shoot arcade platformer.
Minimal requirements
- MS/DOS or compatible
- IBM PC/AT 286 or better
- VGA or compatible graphics
- Keyboard or 2 button joystick (2nd button is used for jump)
- AdLib or compatible for music
- SoundBlaster or compatible for sound effects
Sound and the BLASTER env variable
The game uses the BLASTER environment variable to configure your SoundBlaster.
If you are using DosBox (or one of its siblings), that will be handled for you. Otherwise you can check this Apogee FAQ for instructions.
The AdLib settings are auto-configured and the game also plays fine without sound.
Joystick calibration
If a joystick (or gamepad) is detected, the game will require it to be
calibrated once. After that, the calibration is saved in the file JOY.RC.
If you change joystick, you may need to re-calibrate: delete the JOY.RC file
before starting the game.
Resetting the Hall of Fame
If you want to go back to the default table, just delete HI.RC in the game
directory.
How to Play
You have 60 seconds to rescue all the crew members captured by the aliens on each stage before running to the exit.
If the time runs out, your character will lose a life.
There are some special pick-ups:
- Bonus points: pick up pizza slices, soda cans and shareware diskettes for extra points.
- Energy bomb: an energy wave will cross the stage hitting all enemies in its path.
- Extra time: reset the clock back to
60seconds. - Extra life: add one extra life, up to
9.
When completing a stage there are extra bonus points for:
- Time left after reaching the exit.
- Disposing of all the aliens on the screen.
- Completing the stage without losing a life.
There are 50 stages in total.
Controls
| Key | Joystick | Action |
|---|---|---|
| Cursor left | Joystick left | Move left |
| Cursor right | Joystick right | Move Right |
| Cursor up / X | Button 2 | Jump |
| Z | Button 1 | Fire blaster |
| P | - | Pause / resume game |
| ESC | - | Abandon the game |
The game menu includes a help section with this information.
Downloads
Latest release (1.1, 2024-12-26): alien-intruder.zip
If you like the game, a coffee is greatly appreciated!
If you don’t have a machine running DOS, you can still play it in dosbox.