But instead of having a nifty gadget, your only tool is the game's camera's perspective.
You can do stuff like this
[youtube]fEY8HrRn-aU[/youtube]
When he grabbed the moon

Thematically it doesn't try to hide it's Portal influence tho, with a totally not GlaDOS voice over, audio logs from a kookie scientist, and not so secret behind the scene parts of the levels.
Still highly recommend.
It's on gamepass now, grab it if you have it.