 Left 4 Dead 2 Overwhelmingly Positive | $10 | 983.6K | $123,926,568 | Nov 16, 2009 | |
 Garry's Mod Overwhelmingly Positive | $6 | 1.2M | $88,773,745 | Nov 29, 2006 | |
 Half-Life: Alyx Overwhelmingly Positive | $60 | 98.5K | $74,527,598 | Mar 23, 2020 | |
 Portal 2 Overwhelmingly Positive | $10 | 440.8K | $55,541,871 | Apr 18, 2011 | |
 Counter-Strike Overwhelmingly Positive | $10 | 252.0K | $31,752,954 | Nov 1, 2000 | |
 Half-Life 2 Overwhelmingly Positive | $10 | 251.9K | $31,738,716 | Nov 16, 2004 | |
 Counter-Strike: Source Overwhelmingly Positive | $10 | 184.4K | $23,233,531 | Nov 1, 2004 | |
 Portal Overwhelmingly Positive | $10 | 181.8K | $22,908,841 | Oct 10, 2007 | |
 Half-Life Overwhelmingly Positive | $10 | 150.8K | $19,003,491 | Nov 19, 1998 | |
 Left 4 Dead Overwhelmingly Positive | $10 | 63.2K | $7,967,060 | Nov 17, 2008 | |
 Counter-Strike: Condition Zero Very Positive | $10 | 26.9K | $3,383,981 | Mar 1, 2004 | |
 Day of Defeat: Source Very Positive | $10 | 22.9K | $2,882,142 | Jul 12, 2010 | |
 | $10 | 16.2K | $2,041,502 | Jun 1, 2004 | |
 Half-Life: Opposing Force Overwhelmingly Positive | $5 | 26.1K | $1,644,292 | Nov 1, 1999 | |
 Half-Life: Blue Shift Very Positive | $5 | 19.2K | $1,210,169 | Jun 1, 2001 | |
 Half-Life Deathmatch: Source Mostly Positive | $10 | 5.0K | $635,142 | May 1, 2006 | |
Counter-Strike: Condition Zero Very Positive | $10 | 4.8K | $603,139 | Mar 1, 2004 | |
 Team Fortress Classic Very Positive | $5 | 8.8K | $555,272 | Apr 1, 1999 | |
 | $5 | 6.1K | $381,321 | Nov 1, 2000 | |
 Deathmatch Classic Very Positive | $5 | 3.2K | $200,950 | Jun 1, 2001 | |
 Half-Life 2: Deathmatch Very Positive | Free | 14.7K | - | Nov 1, 2004 | |
 Half-Life 2: Lost Coast Very Positive | Free | 13.6K | - | Oct 27, 2005 | |
 Half-Life 2: Episode One Overwhelmingly Positive | Free | 31.6K | - | Jun 1, 2006 | |
 Half-Life 2: Episode Two Overwhelmingly Positive | Free | 41.6K | - | Oct 10, 2007 | |
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