List of places where you need Propulsion Cannon?

[admiral1018]

Anyone have a list of all the places where you need the propulsion cannon to access a passage or certain items? The only place I've found is the hidden room behind the crates on the upper floor of the Phi Robotics Center. It reveals a secret room with a bunch of supply crates.

I don't see this info on the wiki or anything. Anyone know of the other spots?

[Andreas]

There's at least one room in the sunken ship. But you don't really need to go there. You can finish the game without building the propulsion cannon.

[admiral1018]

Originally posted by Andreas:

There's at least one room in the sunken ship. But you don't really need to go there. You can finish the game without building the propulsion cannon.

Are you sure it's required there? There's one door that's blocked with debris you can move, but that room can be accessed separately via some vents. Maybe you're referring to a different room than the one I'm thinking of.

[Andreas]

Originally posted by admiral1018:

Originally posted by Andreas:

There's at least one room in the sunken ship. But you don't really need to go there. You can finish the game without building the propulsion cannon.

Are you sure it's required there?

No, I'm not. I didn't find another entrance, but maybe I missed it. I didn't search particularly thoroughly. (And I didn't build the propulsion cannon either - at least not in my final playthrough.)

[wardenwolf]

Originally posted by Andreas:

Originally posted by admiral1018:

Are you sure it's required there?

No, I'm not. I didn't find another entrance, but maybe I missed it. I didn't search particularly thoroughly. (And I didn't build the propulsion cannon either - at least not in my final playthrough.)

I remember two rooms blocked with crates, one needed the cannon to get in (nothing in there that couldn't be missed) and the other also had vent access. The only other place I think I used it was at the Altera base inside the cave where everything is wrecked. There's an area underneath the multi-purpose rooms that can be accessed with it.

[Festive Mints]

As far as I know the only place that you need the propulsion cannon is that one place in Phi Robotics, the two areas in the Mercury II wrecks each have an alternate way in.

There is something fun you can do with the Prawn arm though, you can lift Snow Stalkers and swing them around like Darth Vader, it's pretty neat.

[Coops]

You cannot get to all the minerals (silver, magnetite, copper) in some of the vents in the glacial basin without the cannon. Either remove some rocks or directly extract the nuggets.
There are numerous examples but the caves under the ice when you go up the ladder opposite Phi Robotics has four or five of these.