Very old-fashioned, with more focus on whiteboard programming than on knowledge and programming itself. Memorize the two questions they seem to ask everyone; they do not ask technical questions.
Tips:
Design a simple elevator on the whiteboard.
Calculate the distance between two axis-aligned rectangles.
The following metrics were computed from 1 interview experience for the Valve Software Engineer role in Sweden.
Valve's interview process for their Software Engineer roles in Sweden is extremely selective, failing the vast majority of engineers.
Candidates reported having very negative feelings for Valve's Software Engineer interview process in Sweden.