Metroid Prime + Zelda BotW
Samus crashes on an alien planet and must explore a huge, exotic open world to gather materials to repair her ship and leave the planet. The game is 3rd person, but switches to 1st person whenever Samus puts on her exo-suit. The suit protects her from attacks and hazardous environments (toxic mist or gas, deep water, extreme heat or cold etc.), allows her to move heavy objects and jump very high, and of course has great offensive abilities (like shooting energy beams). However, using the suit consumes energy, so she can’t wear it all the time.
When she’s outside the suit, it shrinks into a floating sphere that follows Samus around. But it still has some uses in that state: it can be used as a remotely controlled drone, and she can grab the sphere to float over gaps or slow her down if she falls. The world is physics based similar to BotW, and while it’s open world, there are a number of large alien structures/ruins left behind by an extinct alien civilization that serve as ‘dungeons’, with lots of physics based puzzles.