For Steam-only games such as TimeShifters, it is recommended (and in fact required) to replace the {{Availability/row| retail | | unknown | | | Windows }}
row with {{Availability/row| Steam | (Steam ID) | Steam | | | Windows }}
.
For instance {{Availability/row| Steam | 1533470 | Steam | | | Windows }}
for TimeShifters.
I figured I should tell you about this as advice for when making future pages.