In this mode, a second player joins the host's story as a second Chuck Greene (or Frank West in Off the Record ) to complete missions and slaughter zombies together.

: The game lacks a native in-game text chat for co-op; players often rely on external tools like the Steam Overlay for communication.

: The money earned in TIR can be transferred to your single-player campaign to purchase expensive items like Zombrex or vehicle keys.

: Mini-games often involve creative ways to kill zombies, such as "Ramsterball" or "Slicecycle."

: The community has developed extensive text and dialogue mods, such as the Off the Record Plus mod, which adds new missions and survivors.