| Online Slot |  40 Shining Coins | 201? | Casino Technology Interactive |
| Online Slot | 40 Shining Jewels | 201? | Casino Technology Interactive |
| Slot Machine | 40 Super Hot | 200? | EGT Euro Games Technology, Ltd. Bulgaria |
| Online Slot | 40 Super Hot | 201? | EGT Euro Games Technology, Ltd. Bulgaria |
| Slot Machine | 40 Super Hot deluxe | 2012 | EGT Euro Games Technology, Ltd. Bulgaria |
| Slot Machine | 40 Super Hot P-Series | 2011 | EGT Euro Games Technology, Ltd. Bulgaria |
| Online Slot | 40 Thieves | 201? | Ganomat |
| Online Slot | 40 Treasures | 201? | Casino Technology Interactive |
| Nintendo 64 cart. |  40 Winks | 1999 | GT Interactive Soft. Corp. NY, USA |
| Sony PlayStation CD |  40 Winks demo Model SLED-02435 | 1999 | GT Interactive Soft. Corp. NY, USA |
| PC/MS-Windows pack. | 40 Winks Model 778080 | 20?? | Steam Valve Corp. |
| Sony PSN: PSone Classics pack. |  40 Winks Model NPEF-00148 | 2010 | Sony Computer Ent. Europe SCEE |
| Sony PlayStation CD | 40 Winks Model SLES-01937 | 1999 | GT Interactive Soft. Corp. NY, USA |
| Sony PlayStation CD |  40 Winks Model SLES-01940 | 1999 | GT Interactive Soft. Corp. NY, USA |
| Sony PlayStation CD | 40 Winks Model SLES-01941 | 1999 | GT Interactive Soft. Corp. NY, USA |
| Sony PlayStation CD | 40 Winks Model SLUS-00874 | 1999 | GT Interactive Soft. Corp. NY, USA |
| Arcade Video game | 40-0 - Forty-Love | 1985 | Taito Corp. Japan |
| Coin-op Misc. game | 400 Miles | 197? | Model Racing S.p.a. Montemarciano, Italy |
| Slot Machine | 400 Series | 1973 | Jennings & Co., O.D. Chicago, IL, USA |
| Commodore VIC-20 type-in | 4000 AD | 1984 | Croftward, Ltd. |
| PC/MS-Windows pack. | 4004-022 Model 1065670 | 2019 | Steam Valve Corp. |
| PC/MS-Windows pack. | 404Sight Model 361630 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 408 - The Forbidden Room Model 1686690 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 4089 - Ghost Within Model 329770 | 20?? | Steam Valve Corp. |
| Amstrad CPC 464 disk | 4096 Colors Demo Hb | 2001 | Thacker, Kevin |
| PC/MS-Windows pack. | 4096 Model 1512520 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 41 Hours - Prologue Model 1536830 | 2021 | Steam Valve Corp. |
| PC/MS-Windows pack. | 41 Hours Demo Model 1416010 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 41 Hours Model 1358020 | 20?? | Steam Valve Corp. |
| Pinball | 41-Derby Model 440 | 1941 | Bally Mfg. Co. Chicago, IL, USA |
| Nintendo DS cart. | 42 All-Time Classics Model NTR-ATDP-EUR | 2006 | Nintendo Co., Ltd. Japan |
| PC/MS-Windows pack. | 42 Ways To Die In Space Model 1865250 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 420 Button Clicker Model 1026180 | 2019 | Steam Valve Corp. |
| Sharp MZ-80K type-in | 420 Bytes Invader | 1988 | Dempa Shinbunsha Japan |
| PC/MS-Windows pack. | 420 Hour Stand-Up Model 536010 | 20?? | Steam Valve Corp. |
| Texas instrument TI-99/4A type-in | 421 | 1983 | Shift Editions Paris, France |
| Commodore C64 type-in | 421 | 1983 | Shift Editions Paris, France |
| Casio FX702p type-in | 421 | 1986 | Shift Editions Paris, France |
| Exelvision EXL 100 type-in | 421 | 1985 | Editions du PSI France |
| Apple II type-in | 421 | 1985 | Editions Mondiales France |
