So I’ve been getting an error when trying to start Steam.

Error: You are missing the following 32-bit libraries, and Steam may not run:

Luckily, I know how to use a search engine and quickly found a promising post by frankster. This did not fix my problems - I had to run this line to get Steam to work on my laptop:

sudo apt-get install libgl1-nvidia-glx:i386

Works like a charm. :)