FIFA and Star Wars round out last week's top three.
The Outer Worlds is no slouch, either.
Borderlands 3 and Ghost Recon also maintain places in the top 10.
In addition, Borderlands 3 and Crash Team Racing Nitro-Fueled continue to thrive.
This is the first time a Sonic game has topped the charts since 2008.
Sekiro: Shadows Die Twice has dethroned Tom Clancy's The Division 2 on the UK sales chart!
They claimed first and second positions, respectively.
But the numbers aren't great for Far Cry.
But the chart is big enough for the both of them.
Capcom recently revealed that it shipped 3 million units in its first week.
The best thing for Capcom since RE7.