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Source is a game engine developed by Valve. It debuted as the successor to GoldSrc. Source does not have a concise version numbering scheme; instead, it is designed in constant incremental updates. The engine began to be phased out by the late 2010s, with Source 2 succeeding it.

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# Name % Price Rating Release Follows Online Peak
$9.99 97.72% Apr 2011 350,905 1,595 98,460
$9.99 97.21% Oct 2007 146,113 417 20,672
$9.99 96.79% Nov 2009 1,230,963 15,500 162,399
$9.99 96.47% Nov 2004 97,700 1,687 64,085
Free 96.15% Aug 2022 12,824 106 3,751
$9.99 96.11% Nov 2006 783,737 19,953 73,863
$9.99 95.07% Nov 2004 441,665 46,220 100,056
$9.99 94.68% Nov 2008 339,210 351 30,616
Free 94.47% Sep 2022 363 19 1,793
$29.99 94.43% Oct 2016 216,220 1,545 27,631
Free 94.04% Jan 2024 26,269 110 7,483
Free 93.86% Apr 2021 31,719 46 5,194
Free 93.83% Jun 2015 59,545 53 3,545
-80% $3.99 93.80% Mar 2020 260,850 1,050 7,158
Free 92.74% Apr 2017 97,815 173 9,335
Free 92.61% Jul 2010 87,975 7 60,467
$19.99 92.16% Nov 2004 15,397 73 3,251
Free 91.73% Jun 2016 48,497 3 790
Free 91.45% Nov 2024 2,640 19 412
Free 91.30% Mar 2023 78 2 193
Free 91.13% Apr 2012 2,116 0 48
Free 91.00% Apr 2017 6,558 0 56
$14.99 90.75% Oct 2013 69,257 22 4,818
Free 90.63% Mar 2015 46,426 30 3,175
Free 90.49% Oct 2014 35,503 2 1,184
$14.99 90.48% Jan 2014 263,341 155 121,575
Free 90.39% Apr 2023 52 7 113
Free 90.34% Jan 2014 10,617 2 1,202
Free 89.64% May 2014 71,579 66 3,537
$9.99 89.64% Sep 2005 26,680 155 7,507
Free 89.63% Oct 2007 1,406,948 41,643 253,997
Free 89.41% Dec 2014 12,932 17 1,015
Free 89.26% Jun 2023 3,230 10 675
$9.99 88.61% Oct 2006 16,868 32 623
Free 88.55% Oct 2011 200,526 534 10,922
88.51% Nov 2004 9,583 130 2,702
Free 88.20% Oct 2017 8,755 34 480
Free 87.98% Nov 2020 1,031 3 43
Free 87.59% Apr 2013 6,272 1 473
Free 87.58% Jan 2023 1,247 4 119
Free 87.00% Sep 2005 26,345 86 2,940
86.52% Nov 2022 3,903 1 651
$19.99 86.34% Dec 2022 7,009 16 228
$9.99 86.18% Oct 2015 39,854 6 947
Free 86.11% Dec 2014 2,924 0 33
$29.99 85.38% Jan 2016 13,019 11 145
Free 85.06% Feb 2010 25,488 23 878
Free 85.05% Jan 2023 2,162 1 226
$9.99 84.99% May 2006 3,009 0 105
Free 84.89% Jan 2021 89 12 142
Free 84.34% Oct 2007 12,920 1 2,533
Free 83.97% Dec 2007 11,424 2 2,399
Free 83.77% Sep 2007 3,230 1 630
Free 83.33% Jul 2024 4,726 4 298
$9.99 83.15% Jul 2006 14,381 1 3,811
-60% $3.99 82.92% Apr 2009 5,261 1 712
Free 82.88% Oct 2017 75,268 17 1,308
Free 82.33% Dec 2007 49,961 8 2,996
$9.99 82.28% Jul 2011 19,489 16 2,481
$9.99 82.24% Apr 2011 15,704 3 4,585
Free 81.84% Jul 2008 5,486 1 126
Free 81.80% Jun 2015 1,414 1 47
Free 81.77% Mar 2007 1,573 0 1,213
Free 80.89% Sep 2005 9,420 0 387
$4.99 80.64% Jul 2014 38,041 8 913
$14.99 80.62% Mar 2017 96,275 3 9,210
Free 80.09% Dec 2024 371 2 115
Free 80.01% May 2019 500 3 8
Free 79.12% Apr 2014 7,780 0 627
$17.99 78.65% Oct 2020 5,495 3 112
Free 78.53% Jun 2018 2,484 37 1,204
Free 78.31% Jun 2017 2,998 58 379
-30% $13.99 77.84% Jul 2021 2,206 0 96
Free 76.35% Mar 2008 3,113 0 1,230
Free 76.13% Jan 2022 401 1 14
$9.99 75.71% Sep 2011 16,447 0 5,283
Free 75.14% Jan 2025 247 2 66
$4.99 74.96% Oct 2010 2,699 2 778
73.98% 10,010 1 1,184
Free 73.92% Jun 2017 884 2 20
Free 73.37% Jan 2016 3,604 0 114
$9.99 72.92% May 2006 6,828 28 223
Free 72.88% Jan 2008 11,507 0 224
Free 72.74% Mar 2016 1,305 1 25
Free 71.69% Sep 2019 389 0 11
$9.99 71.51% Oct 2013 71,623 26 7,624
Free 71.50% Jul 2016 29,784 4 1,123
Free 71.01% May 2014 14,388 0 900
69.49% Jan 2014 6,513 0 3,180
68.28% Nov 2006 740 0 270
$9.99 67.86% Jun 2004 21,319 21 629
Free 66.50% Sep 2014 16,763 2 529
Free 65.98% Jun 2012 28,129 114 4,124
Free 65.82% Sep 2020 26 0 44
Free 65.14% May 2014 18,096 1 3,155
Free 61.73% Jun 2009 1,155 0 971
Free 60.82% Jul 2025 235 26 72
$5.99 60.55% Feb 2016 8,415 0 406
Free 59.97% May 2021 2,571 0 546
59.73% Dec 2022 302 23 7,169
This page contains a list of Steam games using the Source Engine. We detect various technologies such as engines and SDKs used by games on Steam from depot file lists. This process is entirely automatic and does have mismatches, the rule set we use is available on GitHub. You can report issues and suggest new rules there.

These detections rely on our bot owning games to be able to see the file lists. Submit a key for your game improve our coverage!

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Blue discount Product has not been this cheap before (new historical low). Green discount Product is priced on par with lowest recorded price. Purple discount Product is priced on par with lowest recorded price in last two years.

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This page contains: A list of Steam games using Source Engine. Source is a game engine developed by Valve. It debuted as the successor to GoldSrc. Source does not have a concise version numbering scheme; instead, it is designed in constant incremental updates. The engine began to be phased out by the late 2010s, with Source 2 succeeding it. Filters: Games only

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