Here is the Space Quest II solution that will give you full points at the end. The points that you should have at each step are given in [] after each piece of point-scoring action. Generally, north is up, south is down, west is left and east is right.
I've split it up into sections that you can jump to if you want to:
Go out through the door and let your boss shout at you. Get onto the striped platform and then enter the transport tube. Get out at the other end and enter the parked space ship [10]. You will be knocked out, taken to Sludge Vohaul and then taken off by some guards. You'll end up crashing in a forest.
Go south and then back east and then up the ramp and west, getting to the post
box on the upper level. In your pocket will be a form, put this in the slot [33]
and wait. A whistle will arrive, pick it up [35]. Sometime a hovercraft will
arrive, perhaps before this. Hide in some bushes until it is gone [40].
Go to the edge of the swamp (East from the upper path), rub the berries on
yourself [43] and get into the swamp, walking to the eastern edge of the screen.
The swamp monster will leave you alone. On the next screen, go to the northern
edge of the screen, just a bit east of the centre. The swamp will be deeper and
you will be forced to swim. Hold your breath [45], swim down and to the west
then get out of the water into the cave [47] and get the gem [50]. Take another
breath [52] and swim back out.
Then go to the east and climb the dead tree that is at the edge of the chasm
[55] and walk across to the east and walk through the trees to the east. You'll
get caught by a nasty hunter beast and he'll put you in a cage. Yell at him
twice. On the second time he will come towards you. When he is fairly close,
throw the spore at him [60] and get his key [62]. Unlock the cage and get out.
Take the rope that's on the rock [64] and head off the north end of the screen,
behind some bushes. On the next screen, stay close to the bottom and head off
to the west. If you wander too far from the edge, you will be seen and shot.
In the tunnels, put the gem in your mouth to get some light. Go east as far as
you can, then down then east then down all the way, then west all the way, the
down and then east until you enter a cave with a waterfall in it [99]. Swim out
to the east and go with the river. Take the second turn of the river, you will
be spat out into a pool [104].On the Planet
Search the guard that you landed on and take the keycard [13]. Go over to the
crashed ship and push the button to stop the beeping noise [14]. Go off the
screen to the north, avoiding the trap that can be seen outlined on the ground.
Then go to the east and rescue the guy that got caught in the rope [19]. then
go back west and then west again. Pick up on of the spores [23] but be careful
not to get too close to themand knock them. Go north and complete the maze,
being very careful not to touch the roots. Pick some of the berries [27] and
then get back out through the maze [31]. In the Chasm
Head west again, tie the rope to the log that's over the chasm [66], and climb
down. Swing on the rope [68] and let go at the right time [73], taking care not
to be caught by the vicious beast. Go west into the cave and use the gem for
light [75]. You'll fall down a tunnel and come out in the bottom of the canyon.
Listen to the guys talk and then follow then, remembering to pick up your gem
again [76]. When you want to go, say 'the word' to the man [79] and he'll let
you out.