Format

All data sent over the network is Little-Endian. The only difference is that when compression is enabled, the data is compressed using LZ4.

Structure

tip

When looking for LZ4 compressed blocks in memory - keep an eye out for the 0xF0 byte marking the beginning. It won't always be there but it's really common

Field Name	Field Type	Notes
Packet ID	Unsigned Byte
Data	Variable	Size is retrieved through Steam's networking functions. Data can be any length including zero, depends on packet ID.