Grand Cross (1984)

In a laboratory located in an underground nuclear‑testing facility in Arizona a scientist completed the ultimate weapon capable of destroying an entire solar system. The scientist intended to use the device for the sake of peace and issued a warning to the entire world: “If nuclear tests are carried out from this point forward, the world will be destroyed by this device.” The scientist passed away but his will remained programmed into a computer. Unfortunately, one nation ignored the warning and conducted a nuclear test. After the computer detected the fallout with its sensors it began an automatic countdown to activate the ultimate weapon. The Earth Federation has tasked you with infiltrating the underground facility and breaking through numerous security systems to reach the lowest floor of the facility in order to stop the detonator of the ultimate weapon.

Grand Cross is the sequel to Cosmo Cross, it mixes text adventure game elements with 3D mazes. You start off with 100 powers of health and every move taken will decrease by one. On the right, you have a command box, where you type in the abbreviated letters which translates to an answer.

The 18 commands given are:

F - Forward 1 Step
FF - Forward 2 Step
TL - Turn Left
TR - Turn Right
TB - Turn Back
OF - Open & Forward
Enter - Forward 0 Step
RE - Rest
TLH - Take Left Hand
TRH - Take Right Hand
PLH - Put Left Hand
PRH - Put Right Hand
ST - See Through
FI - Fight
D - Down
GU - Give Up
1 - On
0 - Off

There is an indestructible wall that is always after you and won't stop until it catches up or loses track of you. Closed doors in your way should be opened first or you'll walk blindly into them and lose some power. When a robot appears, you have the choice to fight it with the items you found. Be aware that without them, you are completely defenseless and you'll instantly die when the power reaches 0. To recover fully or escape, you can rest at some times or give up and be sent to a random location in the area.