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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 350,502 1,157 98,460
$9.99 97.21% Oct 2007 145,932 369 20,672
$9.99 96.79% Nov 2009 1,227,265 17,387 162,399
$9.99 96.47% Nov 2004 97,344 1,387 64,085
Free 96.14% Aug 2022 12,770 99 3,751
$9.99 96.11% Nov 2006 782,033 16,097 73,863
— 95.16% Oct 2007 51,065 13 1,419
$9.99 95.06% Nov 2004 441,536 49,783 100,056
$9.99 94.67% Nov 2008 338,857 310 30,616
Free 94.50% Sep 2022 363 16 1,793
-80% $5.99 94.42% Oct 2016 215,680 1,419 27,631
Free 94.04% Jan 2024 26,193 61 7,483
Free 93.83% Jun 2015 59,571 37 3,545
Free 93.83% Apr 2021 31,697 28 5,194
$19.99 93.81% Mar 2020 260,628 718 7,158
— 93.75% Jun 2006 17,441 8 1,132
Free 92.74% Apr 2017 97,847 214 9,335
Free 92.62% Jul 2010 88,016 8 60,467
$19.99 92.17% Nov 2004 15,392 42 3,251
Free 91.74% Jun 2016 48,521 2 790
Free 91.63% Nov 2024 2,614 19 412
Free 91.42% Mar 2023 78 6 193
Source Filmmaker Application
Free 91.16% Jul 2012 134,559 829 3,975
Free 91.09% Apr 2012 2,109 2 48
Free 90.99% Apr 2017 6,556 0 56
$14.99 90.76% Oct 2013 69,213 15 4,818
Free 90.68% Mar 2015 46,434 22 3,175
$14.99 90.50% Jan 2014 263,431 114 121,575
Free 90.49% Apr 2023 52 5 113
Free 90.47% Oct 2014 35,523 6 1,184
Free 90.37% Jan 2014 10,614 1 1,202
$9.99 89.65% Sep 2005 26,668 122 7,507
Free 89.63% May 2014 71,590 55 3,537
Free 89.55% Oct 2007 1,404,722 28,220 253,997
Free 89.46% Dec 2014 12,934 10 1,015
Free 89.18% Jun 2023 3,215 10 675
-75% $2.49 88.62% Oct 2006 16,773 15 623
Free 88.54% Oct 2011 200,384 530 10,922
— 88.48% Nov 2004 9,571 80 2,702
Free 88.13% Oct 2017 8,693 19 480
Free 87.84% Nov 2020 1,024 5 43
Free 87.78% Apr 2013 6,267 2 473
Free 87.46% Jan 2023 1,241 3 119
— 87.04% Oct 2005 14,618 1 180
Free 86.98% Sep 2005 26,343 44 2,940
— 86.54% Nov 2022 3,904 2 651
$14.99 86.25% Dec 2022 6,968 11 228
$9.99 86.16% Oct 2015 39,834 3 947
Free 86.06% Dec 2014 2,921 2 33
-77% $6.89 85.40% Jan 2016 13,002 7 145
Free 85.28% Jan 2023 2,148 0 226
Free 84.99% Feb 2010 25,460 3 878
Free 84.90% Jan 2021 89 9 142
$9.99 84.84% May 2006 2,999 0 105
Free 84.31% Oct 2007 12,925 0 2,533
Free 83.89% Dec 2007 11,425 1 2,399
Free 83.73% Sep 2007 3,230 0 630
Free 83.22% Jul 2024 4,718 6 298
$9.99 83.18% Jul 2006 14,391 0 3,811
Free 82.87% Oct 2017 75,306 11 1,308
$9.99 82.85% Apr 2009 5,246 4 712
Free 82.32% Dec 2007 49,988 5 2,996
-75% $2.49 82.26% Jul 2011 19,453 22 2,481
$9.99 82.24% Apr 2011 15,696 6 4,585
Free 81.83% Mar 2007 1,573 0 1,213
Free 81.82% Jul 2008 5,489 3 126
Free 81.73% Jun 2015 1,410 2 47
$14.99 80.69% Mar 2017 96,331 6 9,210
$4.99 80.66% Jul 2014 38,064 1 913
Free 80.63% Sep 2005 9,420 0 387
Free 79.98% May 2019 498 1 8
Free 79.84% Dec 2024 367 2 115
Free 79.14% Apr 2014 7,777 1 627
Free 78.52% Jun 2018 2,484 2 1,204
$17.99 78.35% Oct 2020 5,466 2 112
Free 78.28% Jun 2017 2,993 34 379
$19.99 77.84% Jul 2021 2,208 0 96
Free 76.31% Jan 2022 400 0 14
Free 76.31% Mar 2008 3,108 0 1,230
$9.99 75.73% Sep 2011 16,450 0 5,283
— 75.29% — — 2 15
$4.99 75.06% Oct 2010 2,702 0 778
Free 75.03% Jan 2025 242 0 66
Free 73.97% Jun 2017 886 0 20
— 73.96% — 10,013 0 1,184
Free 73.30% Jan 2016 3,601 0 114
$9.99 72.85% May 2006 6,815 20 223
Free 72.80% Jan 2008 11,507 1 224
Free 72.74% Mar 2016 1,305 0 25
Free 72.34% Sep 2019 386 0 11
Free 71.51% Jul 2016 29,792 3 1,123
$9.99 71.50% Oct 2013 71,621 22 7,624
Free 71.06% May 2014 14,375 1 900
— 69.49% Jan 2014 6,525 0 3,180
— 68.31% Nov 2006 740 0 270
$9.99 67.90% Jun 2004 21,318 14 629
Free 66.48% Sep 2014 16,772 1 529
Free 66.05% Jun 2012 28,118 101 4,124
Free 65.76% Sep 2020 26 1 44
Free 65.15% May 2014 18,111 0 3,155
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!

Discount color explanation

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.

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.

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