| Tape image | /pub/sinclair/games/u/Underground.tzx.zip | 31,937 | - | NoneOriginal release (O) | | |
| Tape image | /pub/sinclair/games/u/Underground_3.tap.zip | 31,838 | - | NoneOriginal release (O) | | |
| Loading screen | /pub/sinclair/screens/load/u/scr/Underground_4.scr | 6,912 | - | | | |
| Running screen | /pub/sinclair/screens/in-game/u/Underground_4.gif | 6,039 | - | | | |
| Instructions | /pub/sinclair/games-info/u/Underground.txt | 4,546 | - | | | |
| Game map | /pub/sinclair/games-maps/u/Underground.png | 137,193 | - | | | |
| Inlay - Front | /pub/sinclair/games-inlays/u/Underground.jpg | 88,368 | - | | | |
| Ripped in-game/theme music in AY format | /pub/sinclair/music/ay/games/u/Underground.ay.zip | 1,397 | - | | | |
| POK pokes file | /zxdb/sinclair/pokes/u/Underground (1988)(System 4).pok | 100 | c16096a70bdbe3e25d4a57af5c96eb7c | | | |