| Cosmos Cop (1991) | 7,757 | 25 |
| Cosmos Invictus (2018) | 5,346 | 21 |
| Cosmos X2 (2010) | 21,930 | 5 |
| Cosmoteer (2017) | 17,508,035 | 3,661 |
| Cosmoteer: Starship Architect & Commander (2022) | 3,104,412 | 898 |
| Cosmotronik (2021) | 8,748 | 7 |
| Cosplay Club (2023) | 584,848 | 43 |
| Cosplay Simulator (2022) | 23,233 | 14 |
| Cossacks 3 (2016) | 58,010,179 | 15,803 |
| Cossacks II: Napoleonic Wars (2005) | 2,885,167 | 1,487 |
| Cossacks: European Wars (2000) | 8,493,237 | 1,920 |
| Cossanox (2019) | 124 | 4 |
| The Cost of Recovery (2021) | 2,820 | 8 |
| Costa Verde Transport Department (2023) | 22,634 | 42 |
| Costly Adventure (2023) | 100 | 3 |
| Costume Quest (2010) | 6,557,243 | 6,660 |
| Costume Quest 2 (2014) | 7,169,052 | 4,750 |
| Cotton 2: Magical Night Dreams (1997) | 147,553 | 313 |
| COTTOn Boomerang - Saturn Tribute (2022) | 2,508 | 13 |
| Cotton Fantasy (2021) | 575,862 | 824 |
| Cotton Reboot (2021) | 369,574 | 549 |
| Cotton: Fantastic Night Dreams (1991) | 2,403,241 | 663 |
| Couch Combat (2022) | 549,254 | 241 |
| Couch Monsters (2021) | 206,108 | 38 |
| The Council (2018) | 106,756,538 | 14,085 |
| The Council of Hanwell (2018) | 10,645,633 | 125 |
| Council of Mages: The Party Game (2024) | 79 | 3 |
| The Count (1979) | 497,115 | 109 |
| Count Duckula 2 (1992) | 53,318 | 48 |
| The Count Lucanor (2016) | 7,778,051 | 2,203 |
| Count Pumpcula (2023) | 10,605 | 14 |
| Countdown (1990) | 914,605 | 219 |
| Countdown Final Zone (2024) | 68 | 4 |
| Countdown Timer (2023) | 4,135,834 | 692 |
| Countdown to Doom (1982) | 23,574 | 15 |
| Countdown to Shutdown (1984) | 4,557 | 9 |
| Countdown Vampires (1999) | 3,294,107 | 1,203 |
| Counter Action (1996) | 100,718 | 55 |
| Counter Clash (2025) | 3,803 | 14 |
| Counter Fight (2016) | 32,982,759 | 631 |
| Counter Force (2007) | 313,406 | 52 |
| Counter Recon: The First Mission (2021) | 31,418 | 17 |
| Counter-Strike (1999) | 2,611,638,860 | 346,148 |
| Counter-Strike 2 (2023) | 58,039,974,542 | 3,615,592 |
| Counter-Strike Neo (2005) | 319,491 | 96 |
| Counter-Strike Nexon: Studio (2014) | 32,083,215 | 8,053 |
| Counter-Strike Nexon: Zombies (2014) | 6,826,435 | 1,162 |
| Counter-Strike Online (2008) | 313,400,550 | 26,675 |
| Counter-Strike Online 2 (2013) | 85,379,385 | 9,069 |
| Counter-Strike: Condition Zero (2004) | 56,044,737 | 22,517 |
| Counter-Strike: Malvinas (2013) | 71 | 1 |
| Counter-Strike: Source (2004) | 48,211,473,717 | 499,722 |
| Counter-Stroke: Grand Building (2022) | 0 | 0 |
| Counter: Side (2021) | 77,459,771 | 38,517 |
| CounterAttack: Uprising (2019) | 4,066 | 41 |
| Counterclocking (2023) | 1,794 | 25 |
| CounterSpy (2014) | 3,134,094 | 1,719 |
| Countess in Crimson (2022) | 74,523 | 8 |
| Countin' Stars (2024) | 603 | 2 |
| Countless Army (2024) | 43,607 | 15 |
| Country Dance (2011) | 1,315,665 | 384 |
| Country Dance 2 (2011) | 1,310,879 | 96 |
| Country Dance All Stars (2012) | 59,851 | 23 |
| Country Hopper (2025) | 0 | 0 |
| Country Justice: Revenge of the Rednecks (2005) | 10,035,518 | 45 |
| Country Life (2009) | 147,715 | 98 |
| Country Tales (2015) | 15,910 | 168 |
| Country Tales 2: New Frontiers (2024) | 6,952 | 37 |
| Countryball The Real Time Strategy Game (2025) | 251,568 | 3 |
| CountryBalls Heroes (2021) | 1,534,237 | 213 |
| Countryballs: Over The World (2018) | 1,862 | 7 |
| Countryside Life Simulator (2024) | 524,708 | 52 |
| The Courage to be Disliked (2024) | 25,958 | 23 |
| Courier Chief Tycoon (2023) | 0 | 0 |
| Courier Crisis (1997) | 187,804 | 223 |
