Ahead of the launch of CES 2014, CEA's Senior Vice President of Communications Jeff Joseph presents a sneak peek video from the show floor.
It was previously known that iBuyPower and Digital Storm were on board to produce Steam Machines, but another 10 manufacturers have been added to the list.
Alienware, Falcon Northwest, iBuyPower, CyberPowerPC, Origin PC, Gigabyte, Materiel.net, Webhallen, Alternate, Next, Zotac and Scan Computers will also support Valve's initiative, according to Engadget.
More details will emerge this week as the full lineup will be on display at CES 2014 this week. One notable absence from this list is Xi3, which previously released the Xi3 Piston along with a vague press release that claimed it had the rights to produce the world's first official Steam Box.
Valve's press conference will take place at 17:00 PT (01:00 GMT) Monday. The company recently sent out 300 test units to beta participants to indicate what can be expected of the machines. The first Steam Machines are expected to go on sale this year; perhaps we will find out a release schedule today.