While writing a paper about a card game I come across An experimental LaTeX Poker Package, which allows cards symbols. It looks perfect for my needs.
However when adding \usepackage{poker} I get the following error:
LaTeX Error: File `poker.sty' not found. The compiler cannot find the file you want to include. Make sure that you have uploaded the file and specified the file location correctly.
A follow-up question:
After following your advices, I placed pst-poker.sty in the Overleaf folder and used \usepackage{pst-poker}, however, when I write
\Qh, \Ks, \fiveh, \ninec I get 
Solved:
As stated at Getting pst-poker to work, I had to change Overleaf's compiler to XeLaTeX, this is done at: Menu > Settings > Compiler.

pst-pokerwhich is based on the package you found, and this newer package is on CTAN. – Marijn Mar 06 '19 at 13:53sty-file, but not the auxiliary files (images) as suggested by @Marjin's comment under my answer. But wihtout a MWE it's hard to tell for us. If the follow-up question begins to evolve into it's own question, please consider opening a new question. – sheß Mar 07 '19 at 08:38