| Karoshi 2.0 (2008) | 66,851 | 19 |
| Karoshi Factory (2008) | 11,624 | 14 |
| Karoshi: Suicide Salaryman (2008) | 0 | 0 |
| Karous (2006) | 140,641 | 150 |
| Karpatia: Order Of The Comet (2024) | 0 | 0 |
| Karryn's Prison (2021) | 0 | 0 |
| Kart Fighter (1993) | 0 | 0 |
| Kart Kids (2020) | 94,665 | 69 |
| Kart Racing Pro (2017) | 813,879 | 176 |
| Kartia: The Word of Fate (1998) | 261,119 | 341 |
| Karting Grand Prix (1988) | 448,727 | 12 |
| Karting of Banban (2025) | 0 | 0 |
| Karting Superstars (2023) | 62,349 | 133 |
| KartKraft (2022) | 2,622,930 | 499 |
| KartMania Silver (2024) | 574 | 7 |
| KartRider: Drift (2021) | 5,010,541 | 4,457 |
| KartRider: Drift (2022) | 15,254,503 | 3,326 |
| Karvan (2023) | 212 | 2 |
| Karyssia: Queen of Diamonds (1987) | 763 | 2 |
| Kasiori (2021) | 0 | 0 |
| Kaskade (2025) | 387,454 | 42 |
| Kasparov Chessmate (2003) | 16,055 | 36 |
| Kasparov's Gambit (1993) | 7,300 | 6 |
| Kassei - Road Cycling (2024) | 0 | 0 |
| Kasumi Ninja (1994) | 1,559,660 | 170 |
| Kasumi VS Mai (2024) | 0 | 0 |
| Kat Trap (1987) | 0 | 0 |
| Kat's Run: All Japan K-Car Championship (1995) | 126,861 | 54 |
| Katabasis (2012) | 0 | 0 |
| Katakis (1988) | 224,732 | 158 |
| Katamari Amore (2011) | 169,678 | 116 |
| Katamari Damacy (2004) | 50,073,469 | 6,225 |
| Katamari Damacy Mobile (2007) | 28,388 | 14 |
| Katamari Damacy Reroll (2018) | 20,035,786 | 7,838 |
| Katamari Forever (2009) | 31,012,928 | 2,268 |
| Katana Arena (2024) | 0 | 0 |
| KATANA KAMI: A Way of the Samurai Story (2020) | 6,051,780 | 1,450 |
| Katana Rama (2023) | 0 | 0 |
| Katana Zero (2019) | 59,981,668 | 15,145 |
| Katana's Path (2024) | 734 | 3 |
| Katawa Shoujo (2012) | 19,388,514 | 8,220 |
| Kate Arrow: Deserted Wood (2010) | 0 | 0 |
| Kate: Collateral Damage (2021) | 0 | 0 |
| Katharsis (1997) | 7,216 | 6 |
| Katharsis (2017) | 2,046,379 | 39 |
| Kathy Rain (2016) | 3,611,789 | 3,278 |
| Katie (2018) | 86,976,886 | 360 |
| Katja's Abyss: Tactics (2021) | 0 | 0 |
| Katsuya Onizuka Super Virtual Boxing (1993) | 0 | 0 |
| Katy and Bob: Safari Cafe (2018) | 12,878 | 80 |
| Kautic - The Bald Wizard (2017) | 282 | 6 |
| KAVERNUM (2025) | 27,230 | 14 |
| Kawa no Nushi Tsuri (1990) | 0 | 0 |
| Kawa no Nushi Tsuri 2 (1995) | 18,677 | 42 |
| Kawaii Asian Girls (2024) | 8,610 | 11 |
| Kawaii Deathu Desu (2019) | 98,249 | 428 |
| Kawaii Girls (2021) | 3,010,573 | 95 |
| Kawaii Koinu: Wonderful (2004) | 52,840 | 16 |
| Kawaii Koneko DS (2008) | 424 | 4 |
| Kawaii Neko Girls (2021) | 0 | 0 |
| Kawaii Neko Girls 2 (2023) | 1,070 | 6 |
| Kawasaki Caribbean Challenge (1993) | 0 | 0 |
| Kawasaki Fantasy Motocross (2001) | 6,051 | 4 |
| Kawasaki Jet Ski (2007) | 75,093 | 22 |
| Kawasaki Quad Bikes (2007) | 60,908 | 25 |
| Kawasaki Snowmobiles (2008) | 66,977 | 13 |
| Kawasaki Superbike Challenge (1994) | 255,987 | 200 |
| Kay's Destiny (2023) | 0 | 0 |
| Kaya Joshi: Magical Detective (2023) | 4,203 | 7 |
| Kaya's Prophecy (2025) | 50,245 | 41 |
| Kayak VR: Mirage (2022) | 3,611,783 | 991 |
| Kayleth (1986) | 0 | 0 |
| Kaz's Adventure (2022) | 1,609 | 43 |
| Kaz's Adventure 2: Lost Souls (2023) | 1,406 | 26 |
| Kazakh 'Jack (2021) | 40 | 3 |
