| Summer Games (1984) | 117,555,169 | 1,430 |
| Summer Games Heroes (2020) | 5,871 | 17 |
| Summer Games II (1985) | 135,473 | 162 |
| summer haze/glory days (2026) | 13 | 1 |
| Summer Heat Beach Volleyball (2003) | 343,257 | 268 |
| Summer in Mara (2020) | 5,590,519 | 5,873 |
| Summer In Trigue (2021) | 9,725 | 27 |
| Summer Islands (2019) | 2,739,850 | 190 |
| Summer Knights (2019) | 105,023 | 46 |
| Summer Lesson (2016) | 22,026,604 | 933 |
| Summer Lesson: Chisato Shinjo (2017) | 271,227 | 118 |
| Summer Nightmare (2017) | 51,111 | 91 |
| Summer of '58 (2021) | 68,884,669 | 9,410 |
| Summer of Love (2023) | 774,839 | 99 |
| Summer Paws (2020) | 58,423 | 97 |
| Summer Pockets (2018) | 1,648,978 | 1,511 |
| Summer Session (2008) | 475,787 | 60 |
| Summer Sports 2 Island Sports Party (2008) | 28,079 | 19 |
| Summer Sports Games (2019) | 269,160 | 194 |
| Summer Sports: Paradise Island (2008) | 60,669 | 36 |
| Summer Suki - Chat Messaging Game (2024) | 0 | 0 |
| Summer Sweetheart (2019) | 1,970,921 | 259 |
| Summer Trip Cruise (2023) | 370,155 | 67 |
| Summer Wheelie (2017) | 24,812 | 11 |
| Summer with Mia (2021) | 12,482 | 7 |
| Summerland (2020) | 584,105 | 406 |
| Summertime Madness (2021) | 2,322,685 | 472 |
| Summertime Saga (2017) | 81,475,019 | 3,179 |
| SummerVacation (2003) | 163,254 | 18 |
| Summer~Life in the Countryside (2021) | 314,163 | 22 |
| Summit in Space (2021) | 24 | 2 |
| Summit of the Wolf (2020) | 10,368 | 36 |
| SummitX Snowboarding (2011) | 69,152 | 14 |
| Summon Night (2000) | 1,043,003 | 1,123 |
| Summon Night 2 (2001) | 140,106 | 152 |
| Summon Night 3 (2003) | 518,820 | 1,253 |
| Summon Night 5 (2013) | 412,413 | 420 |
| Summon Night 6: Lost Borders (2016) | 1,088,228 | 1,201 |
| Summon Night Craft Sword Monogatari: Hajimari no Ishi (2005) | 38,030 | 161 |
| Summon Night Granthese: Horobi no Tsurugi to Yakusoku no Kishi (2010) | 35,922 | 39 |
| Summon Night X: Tears Crown (2009) | 264,391 | 76 |
| Summon Night: Swordcraft Story (2003) | 1,252,222 | 2,540 |
| Summon Night: Swordcraft Story 2 (2004) | 1,106,071 | 1,698 |
| Summon Night: Twin Age (2007) | 392,254 | 182 |
| Summon Revolt: Magic Battle (2020) | 7,309 | 38 |
| Summoner (2000) | 4,084,489 | 2,985 |
| Summoner 2 (2002) | 621,510 | 553 |
| Summoner Apprentice (2020) | 59 | 3 |
| Summoner Wars (2014) | 12,235,988 | 4,778 |
| Summoner's War: Chronicles (2022) | 16,835,694 | 5,981 |
| Summoner: A Goddess Reborn (2003) | 63,084 | 42 |
| Summoners Fate (2022) | 379,722 | 248 |
| Summoners War: Chronicles (2021) | 5,632,179 | 2,383 |
| Summoners War: Sky Arena (2014) | 849,318,382 | 94,253 |
| The Summoning (1992) | 39,821,449 | 4,092 |
| Summons Board (2014) | 8,356,816 | 4,664 |
| Summum Aeterna (2022) | 1,801,225 | 601 |
| Sumo Fighter (1991) | 220,301 | 77 |
| Sumo Revise (2015) | 635 | 5 |
| Sumo Seals (2022) | 9,769 | 1 |
| Sumo Tanks (2024) | 11 | 2 |
| Sumo Tatami (2025) | 6,166 | 19 |
| Sumorbit (2024) | 2,022 | 503 |
| Sumotori Dreams (2007) | 242,886,811 | 1,091 |
| Sumotori Dreams Classic (2021) | 3,984 | 13 |
| Sumy Shelltris - ICEBLOCKS 3 (2021) | 21 | 4 |
| Sun and dark girl. - TERASENE - (2018) | 310 | 5 |
| Sun Blast: Star Fighter (2015) | 1,057 | 6 |
| Sun Haven (2021) | 5,949,933 | 10,666 |
| The Sun of Broken Euphoria (2023) | 825 | 4 |
| The Sun Shines Over Us (2024) | 61,867 | 130 |
| Sun Star (1986) | 445,146 | 43 |
| Sun's Edge (2023) | 566 | 5 |
| SunAge (2007) | 96,079 | 90 |
| Sunblaze (2021) | 764,021 | 808 |
