  The charge asymmetry in hadronic top-antitop-quark production is a powerful
test observable of perturbative quantum chromodynamics. Since its origin in
terms of Feynman diagrams is distinct from charge-symmetric top-antitop
production, probing the charge asymmetry provides complementary information to
cross section measurements. Furthermore, asymmetric observables offer new ways
to distinguish new physics beyond the standard model. This article summarizes
prospects to investigate the top-quark charge asymmetry at the LHC in and
beyond the standard model. Particular attention is given to observables in
top-antitop production in association with a jet, a photon or a W boson.
