Lock-Keeper
Release Date  1983
Original Publisher  J.J. Donoher (UK)
Min. Hardware  ZX-Spectrum 48K
Language  English
Genre  General: Education
Max. Players  1
Original Price  £4.95

Remarks
     "to encourage reasoning skills"

Magazine Advertisements
     Home Computing Weeklyissue #22-1983/Aug/2 special "week#1"page 38- Classified
     Home Computing Weeklyissue #23-1983/Aug/9 special "week#2"page 37- Classified
     Home Computing Weeklyissue #24-1983/Aug/16 special "week#3"page 37- Classified
     Popular Computing Weeklyissue v.2 #28-1983/Jul/14 special "week#2"page 40- Classified
     Popular Computing Weeklyissue v.2 #29-1983/Jul/21 special "week#3"page 41- Classified
     Popular Computing Weeklyissue v.2 #30-1983/Jul/28 special "week#4"page 40- Classified
     Sinclair Userissue #18-1983/Seppage 138- Classified
     Your Computerissue v.3 #9-1983/Seppage 213- Classified

Links
     Spectrum 2.0(User Reviews)
     The TZX Vault(Software Preservation)
     ZX-Art(Spectrum Graphics)
     ZXInfo(ZXDB Front End)
     Every Game Going(Multi-Platform Archive)
     The Tipshop(Tips, Maps, Solutions, Cheats, Pokes)
     New World Of Spectrum(Spectrum Archive)
     Original World Of Spectrum(Spectrum Archive)
     World Of Spectrum Classic(Spectrum Archive)
     Spectrum Computing(MAIN VIEW)