For those bad at maths, those 500 games generated at least $1.5 billion in gross revenue.

Valve say that the diversity of games finding success on the platform is growing.

There are a handful of other statsincluded in the full annual summary.

The rock spews colourful pixel shards in incremental town builder (the) Gnorp Apologue.

Presumably that’s one lonely Antarctic researcher downloading Modern Warfare.