Hum, cool, thanks.
Now, I've made my way up to the "Habe Quiddam" level, and I'm trying to get the item in the middle of the level, required to complete the level. However, after going down, I fail to go back up. Checking a guide available at Gamefaqs, I found this:
"
To get the alien energy converter (that 'thing' in the lava), you
first need to go up to the top level as described above. When
you get to the room that has the one pillar in the lava and a save
terminal, look around on the upper level and you'll find a button.
Pressing the button will cause the pillar to drop and will allow
you to grab the device. However, to get out of the lava you either
need to grenade jump or wait for the pillar to start to rise again.
Watch that you don't get squished by the pillar! As an option,
you can immediately save the game after activating the pillar, so
that you don't have to transverse most of the level again. Yet another
option is to enter the lava by the 'other' passage, while the column
is descending, and with this route, you can reduce the amount of
maneuvering you have to do in the lava. Note that you will need
to 'create' this other passage by hitting the switch beforehand.
"
I noticed a strange-looking pillar in that area of the lava, near the stated save point, but fail to find the switch (probably an hidden one?) that would move it.
I can't "grenade jump" either, since I can't figure out how to properly do it, and my jumps are always small ones >_<
Here is a map of the place where I'm stuck, i.e. I jump into the lava but then can't leave it.