In this talk, we present a mechanism of Dark Matter production during first order phase transitions
and happening via the collision of the bubble wall and plasma quanta. We will first study the
possibility that the dark matter is produced via a renormalisable operator. We will observe that
in this context the DM can be much heavier than the scale of the phase transition and has a
large initial velocity, leading to the possibility of the DM to be warm today. We will then turn
to more realistic scenarios where the Dark Matter sector is secluded and its interaction with the
visible sector (including the Standard Model) originates from dimension-five and dimension-six
operators. In this regime, we also find that such DM is typically heavy and warm today. We study
separately the cases of weakly and strongly coupled dark sectors, where, in the latter case, we
focus on glueball DM, which turns out to have very distinct phenomenological properties. For
completeness, we also systematically compute the Freeze-In production of the dark sector and
compare it with the bubble-plasma DM abundances. All the analytical results are collected in a
table presented in this paper.