Overview of Dark Matter searches at the ATLAS experiment

Searches for strongly produced dark matters (DM) in events with jets, photons, heavy-flavor quarks, weak gauge bosons and Higgs bosons recoiling against large missing transverse momentum in ATLAS are presented. These “MET+X” signatures provide powerful probes to DM production at the LHC, being complementary to direct and indirect DM searches and allowing us to interpret results in terms of effective field theory and/or simplified models with pair production of WIMPs. Relevant SUSY interpretations (e.g, in scenarios with gauge-mediated SUSY breaking and compressed SUSY mass spectra) and the connection to astroparticle physics are also discussed. The talk will highlight recent ATLAS results on dark matter searches at LHC Run I as well as first Run II results if available.