  The NA62 experiment at CERN is designed to measure precisely the rare decay
$K^{+} \rightarrow \pi^+ \nu \bar{\nu}$. The intensity and energy of the SPS
proton beam used to produce the $K^+$, as well as the hermetic detector
coverage and overall geometry, give in addition the opportunity to search for
hypothesized weakly-coupled particles at the MeV-GeV mass scale. In these
proceedings the focus lies on reviewing these opportunities and sketching the
current status of some pertinent searches.
