Turtle Rock Studios' new asymmetrical co-op shooter hits number one straight away.
There are no prizes for guessing which game is at number one in the Xbox One chart's this week.
Moving into February could help move the charts around a little, maybe.
Saints Row IV debuts at number four, Rugby 15 at number eight.
Rockstar Games' Grand Theft Auto V still sits at number one in the UK.
GTA V still riding high at number one
GTA V keeps its top position, whilst there is little movement elsewhere.
This week's Xbox One charts are a little stale, which is expected for January.
GTA V, Call of Duty: Advanced Warfare, Assassin's Creed Unity, and FIFA 15 dominated the top of the chart again this week.
Top four chart places remain unchanged, AC: Unity, LBP 3 and WWE 2K15 in the ascendency