  Various WIMP dark matter searches using the full data set of XMASS-I, a
single-phase liquid xenon detector, are reported in this paper. Stable XMASS-I
data taking accumulated a total live time of 1590.9 days between November 20,
2013 and February 1, 2019 with an analysis threshold of ${\rm 1.0\,keV_{ee}}$.
In the latter half of data taking a lower analysis threshold of ${\rm
0.5\,keV_{ee}}$ was also available through a new low threshold trigger.
Searching for a WIMP signal in the detector's 97~kg fiducial volume yielded a
limit on the WIMP-nucleon scattering cross section of ${\rm 1.4\times
10^{-44}\, cm^{2}}$ for a ${\rm 60\,GeV/c^{2}}$ WIMP at the 90$\%$ confidence
level. We also searched for WIMP induced annual modulation signatures in the
detector's whole target volume, containing 832~kg of liquid xenon. For nuclear
recoils of a ${\rm 8\,GeV/c^{2}}$ WIMP this analysis yielded a 90\% CL cross
section limit of ${\rm 2.3\times 10^{-42}\, cm^{2}}$. At a WIMP mass of ${\rm
0.5\, GeV/c^{2}}$ the Migdal effect and Bremsstrahlung signatures were
evaluated and lead to 90\% CL cross section limits of ${\rm 1.4\times
10^{-35}\, cm^{2}}$ and ${\rm 1.1\times 10^{-33}\, cm^{2}}$ respectively.
