A much more expanded sequel compared to the first, more weapons, more enemies, more lore and narration and more variety with levels.

You also have to unlock skills to progress further in some of the levels (akin to Powerslave and Metroid Prime) as well as getting parts of the last weapon (in the same way as the Chronoscepter of the first entry) and the final key (akin to the first game's).

The only downside is that you can get easily lost in some of the levels (especially the one with the cavern maze) but thankfully you have a Doom-esque automap to see where you've been already.

A much more expanded sequel compared to the first, more weapons, more enemies, more lore and narration and more variety with levels. You also have to unlock skills to progress further in some of the levels (akin to Powerslave and Metroid Prime) as well as getting parts of the last weapon (in the same way as the Chronoscepter of the first entry) and the final key (akin to the first game's). The only downside is that you can get easily lost in some of the levels (especially the one with the cavern maze) but thankfully you have a Doom-esque automap to see where you've been already.