Friday the 13th’s servers are struggling to meet player demand on launch day.
A post on the Friday the 13th: The Game’s Kickstarter page addresses a number of issues that players are dealing with today. Regarding the Steam server issues, it states, “We are currently being slammed by thousands and thousands of players and had our servers go down. The servers should be back up, but there is a chance of downtime as we manage server load and spin up more servers to meet demand. If you encounter a server error, please try playing a Private Match with friends. If you need to find players please head over to the Steam forums to get together with other Friday the 13th: The Game fans.”
It also specifically notes that it’s bringing more servers online in Europe and Australia to accommodate demand in those regions. Similarly, servers that handle player progression are being upgraded, so your level may not be displayed properly until that is complete.