The rest of the contributors:

Please note that this list is not up to date, as I am working on an improved version.

• Ambrosine (The Coveted Mirror, G.F.S. Sorceress, Mystery Island)
• Martyn Amos (Runestaff)
• Jim Bakman (Xenon)
• Andrew Barker (Double Agent, Escape, The Final Mission, Invincible Island, Smuggler's Cove)
• John Barnsley (The Curse, Star Wreck)
• Bill Bennett (Red Moon clue sheet)
• Jonathan Blask (East of Eastwood, Gunslinger, The Mist, The Sceptre Quest, Twilight Zone)
• Finn Bolding (Dance of the Vampires, Dead End, and others)
• Alex Cattaneo (There's a Bomb Under Parliament)
• Mark Chester (Ground Zero)
• Duncan Cross (Gerbil Riot of '67)
• Anthony Deakin (Cloak of Death)
• Dark Fiber (C64 IF pages, Himalayan Odyssey, Mystery Island)
• Alex Dijkstra (Adventure Without a Name, African Adventure, Corya: The Warrior Sage, The Curse of the Volcan, Danger Mouse in the Black Forest Chateau, Het Geheim van de Drie Burchten, Horrorhotel, Hospital Adventure, I.T. - de Adventure van de Eeuv Murder, Journey to the Centre of the Earth, Mystery Tower (AD), Mystery Town (AD), De Natchwatch, Noach 3000, De Sekte - MSX version, Spy Story, Zauberschloss, Zakil Wood)
• Paul Doherty (Level 9 clue sheets)
• Erudite Troglodyte (The Appleton, Captain Kook, Escape From Hodgkins Manor, Personal Computer Whirled!, Rhyme Crime, Sam's Unexcellent Adventure, Teacher Trouble)
• Ricardo Ferreira (Black Sanctum, Sea Search, Shenanigans, Trekboer, The Vortex Factor)
• FijneWIET (De Sekte - c64 version)
• Roy Fisher (Tunnelmaze, Valleymaze)
• Phoebe M. Fuentes (Castle of the Skull Lord, A Holiday to Remember, The Jade Necklace, Kidnapped, One of Our Wombats is Missing, Run Bronwynn Run, Secret of Little Hodcome, The Taxman Cometh
• Erik Futtrup (Stationfall)
• Barbara Gibb (Castle of Riddles, Countdown to Doom, Dracula Island, Eye of Zolton, The Pobjoy Special, Project Thesius, The Puppet-Man, Rohak the Swordsman, Starship Quest)
• Jim Groom (The Last Warrior)
• William Heckadon (Star Trek: The Promethean Prophecy)
• Jackie Holt (Necris Dome)
• Aran Johnson (forwarded many hints and solutions)
• D. Jones (Token of Ghall)
• Kabish (Megacorp)
• Mark Keiter (Pool of Radiance maps, Champions of Krynn + maps)
• Marco Lanaro (1942 Mission)
• Nicolas Langlois (Lucifer's Realm)
• Steve Ludlow (Empire of the Overmap + map)
• Sean Murphy (Bedlam + map)
• Kevin Oates (Danger! Adventurer at Work)
• Odd Magne Ogreid (African Safari, Catacombs, Colditz Castle, The Last Inca, Realm of the Warrior + a bundle of half-finished solutions he's completed)
• Jonathan Ormond (Rick Hanson)
• Guido van Otterlo (The Eighth Crime, Offensive Probing, Talisman)
• Walter Pooley (Dan Diamond Trilogy)
• Gregory Quinn (Hexagonal Museum)
• William Quinn (L.A. Adventure)
• QN (The Eighth Crime, Nythyhel)
• Radek (Elvira II, Wonderland)
• Dominick Rampa (Earthly Delights)
• Fredrik Ramsberg (Hidden Treasure of Inca, Nellan is Thirsty)
• Chris Richardson (Labyrinths of LaCoshe)
• Sherwin Robb (Bermuda Triangle, Black Tower, Black Tower 2: A Serpentine's Tale, Castle Adventure, Kobyashi Ag'Kwo, Phoenix 1-4, Shard of Inovar, Venom)
• Michael Robertson (Dunnet)
• Shawn B. Ryan (Robots of Dawn)
• Andrew Schultz (Bored of the Rings, Forbidden Castle)
• Jeremy Smith (Knight Orc clue sheet)
• R.E. Smith (Time Traveller)
• B. Steele (A Tangled Tale)
• Kim Stevens (Galilee)
• Terry Stewart (Savage Island)
• Christian Swoboda (Faulty Towers, Island Adventure, Sherlock Holmes: Another Bow, Star Trek TNG: The Transinium Challenge)
• Chris Thompson (The Atlas Assignment, ID, The Island (Virgin), Mad Martha 1 + 2, The Moreby Jewels, The Ocean Dancer, Project-X 1)
• TJBAD (Presumed Guilty)
• Karen Tyers (Cloud 99, The Darkest Road, Enchanted Castle, Going Critical, The Hammer of Grimmold, Rhyme Cryme, There's a Hole in My Bucket, 'Twas a Night of Dread, The Unborn One)
• E. Yoong (Classic Adventure, The Mural)
• Vicko Vitasovic (Deadly Mission, Neptune's Caverns)
• Geoff Wallis (A Legacy of Aleric part 2, Arnold the Adventurer, Blink, Blob Quest, Civil Service 1+2, The Curse of Shaleth, Ellisnore Diamond, The Envelope, Gladiator, A Glasgow Murder, The House, Into the Mystic, Kidnapped, Murder Mystery Weekend, Napoleon's Sandwiches, Norman's Lament, Quest For the Last Baked Bean, Rainbow's End, Shakey City, Sleepin' Again, Star Reporter, Stuck in Space)
• David Whyld (Tower of Despair)
• Andrew Williams (HitchHiker-64, The Secret of Bastow Manor)

Sorry to anyone forgotten!!