Here is a list of hidden object games with little to no adventure.
Straight HOG's: (may have some light interaction and/or devilish puzzles (ie. MCF: Ravenhearst & MCF: Madame Fate)
Hide & Secret 4: Lost World was definitely an IHOG (which I loved!), but I think the first three in the series were straight HOG's. Maybe someone else can tell us for sure.
Straight HOG's: (may have some light interaction and/or devilish puzzles (ie. MCF: Ravenhearst & MCF: Madame Fate)
- 100% Hidden Objects
- 1912: Titanic Mystery
- Amazing Adventures (whole series)
- Artifacts of the Past: Ancient Mysteries (HOG/FROG)
- Atlantis: Mysteries of Ancient Inventors
- Barn Yarn
- Becky Brogan The Mystery of Meane Manor
- Big City Adventures (whole series)
- Cassandra's Journey 1 & 2 (IHOG-lites)
- Cate West: The Vanishing Files (HOG w/some Fragmented Objects)
- Classic Adventures: The Great Gatsby
- The Crop Circle Mystery
- Downtown Secrets (HOG w/light interaction)
- Epic Adventures: La Jangada
- Escape Rosecliff Island
- Escape Whisper Valley
- Escape the Emerald Star
- Finding Hope (IHOG-lite)
- Fishdom H2O
- Forgotten Riddles: Moonlight Sonata (HOG with light interaction)
- Gardenscapes 1 & 2
- Gardenscapes Mansion Makeover
- Haunted Hotel
- Haunted Hotel: Believe the Lies
- Hidden Expedition 1: Titanic
- Hidden Expedition 2: Everest
- Hidden Expedition 3: Amazon (rest of the series is IHOG)
- Hidden World of Art
- Hidden World of Art 2: Undercover Art Agent
- Interpol 1: The Trail of Dr. Chaos
- Interpol 2: Most Wanted
- Kellie Stanford: Turn of Fate
- L. Frank Baum's The Wonderful Wizard of Oz
- Letters from Nowhere 1 & 2 (IHOG-lite, I think)
- Mind's Eye: Secrets of the Forgotten
- Muse (delightful - last I checked, BF had the wrong graphics up on their page!)
- The Mysterious Past of Gregory Phoenix
- Mystery Case Files 1: Huntsville
- Mystery Case Files 2: Prime Suspects
- Mystery Case Files 3: Ravenhearst
- Mystery Case Files 4: Madame Fate (the rest of the series is IHOG)
- Mystery P.I. (whole series)
- Pirate Mysteries: A Tale of Monkeys, Masks & Hidden Objects
- Neptune's Secret
- Pure Hidden
- Real Crimes: Jack the Ripper
- Redrum 1 (#2 is IHOG)
- Relic Hunt
- Rhianna Ford & the Da Vinci Letter (IHOG-lite)
- Season of Mystery: The Cherry Blossom Murders (IHOG-lite)
- Sherlock Holmes The Mystery of the Persian Carpet
- Shutter Island
- Spirit of Wandering: The Legend
- Steve the Sheriff 1 & 2
- Tales of Lagoona
- Undiscovered World: The Incan Sun
- Vacation Quest: Australia
- Vacation Quest: The Hawaiian Islands
- Valerie Porter and the Scarlet Scandal
- Veronica Rivers - Portals to the Unknown
- Veronica Rivers: The Order of Conspiracy (IHOG-lites?)
- Yard Sale Hidden Treasures: Lucky Junction
- Yard Sale Hidden Treasures: Sunnyvale
Hide & Secret 4: Lost World was definitely an IHOG (which I loved!), but I think the first three in the series were straight HOG's. Maybe someone else can tell us for sure.