Project G.O.L.I.A.T.H. was a S.H.I.E.L.D. scientific project led by Hank Pym and Bill Foster.
Working for S.H.I.E.L.D., Hank Pym and Bill Foster cooperated in Project G.O.L.I.A.T.H., where they experimented with the Pym Particles in order to expand their body mass. Foster was able to achieve a maximum height of 21 feet. However, Foster decided to leave the project and then it was quickly abandonded, in the wake of Pym's resignation from S.H.I.E.L.D.
Years later, Tony Stark asked J.A.R.V.I.S. to find him information about Project G.O.L.I.A.T.H. while working on the new element he had discovered.