  We employ the Forcer algorithm to renormalize a variety of six dimensional
field theories to four loops. In order to achieve this we construct the Forcer
master integrals in six dimensions from their four dimensional counterparts by
using the Tarasov method. The $\epsilon$ expansion of the six dimensional
masters are determined up to weight $9$ where $d$ $=$ $6$ $-$ $2\epsilon$. By
applying the Forcer routine the four loop MSbar renormalization of $\phi^3$
theory is reproduced before gauge theories are considered. The renormalization
of these theories is also determined in the MOMt scheme. For instance the
absence of $\zeta_4$ and $\zeta_6$ is confirmed to five loops in the MOMt
renormalization of $\phi^3$ theory. We also evaluate the three loop
$\beta$-function of the gauge coupling in six dimensional QCD.
