Oméga, planète invisible

Oméga, planète invisible (French for Omega: Invisible Planet) was developed and released in France in 1985 and then localized in German as Omega, der geheime Planet (German for Omega: the Invisible Planet). It is a computer game with some cosmetic elements reminiscent of role-playing games; it is a science-fiction game that uses the same engine as Mandragore. Also, it is a precursor of Drakkhen, that is a full-fledged role-playing game.

Story
In a nutshell: the bad guy has to be defeated in his fortress on Oméga, the invisible planet hidden in the middle of an asteroid field. A party of adventurers should first explore six other planets and earn enough money to purchase an asteroid deflector and reach that invisible planet.

Gameplay

 * Interface: apart from movement, all actions are controlled by a simple text parser; since there are a few more commands than letters on the keyboard, for some commands the player should type two letters. The player should specify the acting character (numbered 1 to 4), the action, and the object (A to D or 1 to 9). Combat is neither turn-based nor in real-time, but controlled by the same text parser, thus depending on the player's typing speed.
 * Character progresson: although each hero in Oméga, planète invisible has six attributes borrowed from role-playing games, they are constant throughout the game and they have no real effect on any action; the experience points are just each character's score. Thus, the game is better categorized as .
 * Dialogue: although the spacemen in the star bases have nothing to say about your quest, every planet hosts several creatures and even enemies who will give clues about the puzzles on the same planet.
 * Freedom of exploration: the first six planets can be explored in any order. Their structure will be used in Drakkhen and the  series, too: large fixed-screen views with passages to the adjacent screens.