A Lott of work to do. The Sun. News Group Newspapers Ltd. 5 April 2010 [12 April 2010]. (原始内容存档于2013-12-09). They are concerned that Turn It Up has only
(原始内容存档于2020-06-07). Seppala, Timothy J. Half-Life 2 crowbars its way out of Linux beta, brings Oculus Rift support with it. Engadget. 2013-06-27 [2017-05-15]