  Motivated by the Galactic Center gamma-ray excess in the Fermi-LAT data, we
study the signatures of a class of tau portal dark matter (DM) models where DM
particles preferentially couple to tau leptons at the LHC. We consider the
constraints from the DM direct detection and investigate the sensitivity of the
LHC to di-tau plus missing energy signatures. We find that the LHC with a high
luminosity of 3000 fb$^{-1}$ can test the tau portal DM models with fermionic
mediators in the mass range of $120\sim450$ GeV.
