Some more games to fit on this list, I apologize in advance for so many but I really went through my backlog / backlog lists out of curiousity (esp. since I felt 40% would be reasonably common):

Soul Nomad & the World Eaters (396 Backlogs, 196 Wishlists vs. 171 Plays: A true Backlogcore champ!)
Heaven Will Be Mine (791 Backlogs, 667 Wishlists vs. 518 Plays)
The friends of Ringo Ishikawa (676 Backlogs, 607 Wishlists vs. 498 Plays)
Moon: Remix RPG Adventure (2.1k Backlogs, 1.6k Wishlists vs. 1.1k Plays)
Kartia: The Word of Fate (237 Backlogs, 148 Wishlists vs. 83 Plays: 470 Total Logs)
Pandora's Tower (1.1k Backlogs, 605 Wishlists vs. 578 Plays)
Panzer Dragoon Saga (996 Backlogs, 646 Wishlists vs. 491 Plays)
Threads of Fate (654 Backlogs vs. 450 Plays)
Bulk Slash (362 Backlogs vs. 225 Plays)
Wheels of Aurelia (481 Backlog vs. 365 Plays)
Demon Turf (603 Backlogs vs. 552 Plays)
Radiant Historia (1.2k Backlogs vs. 944 Plays)
Baten Kaitos: Eternal Wings and the Lost Ocean (924 Backlogs vs. 655 Plays)
The Misadventures of Tron Bonne (717 Backlogs vs. 497 Plays)
Valkyrie Profile (1.9k Backlogs vs. 1.3k Plays)
Valkyrie Profile 2: Silmeria (768 Backlogs vs. 557 Plays)
Xenosaga Episode III: Also sprach Zarathustra (1.8k Backlogs vs. 1.3k Plays)
Tactics Ogre: Let Us Cling Together (PS1/SNES: 660 Backlogs, 398 Plays PSP remake: 461 Backlogs, 431 Plays)
Skies of Arcadia Legends (1k Backlogs vs. 725 Plays: Dreamcast version also has more backlogs than plays)
Sakura Taisen (Saturn: 351 Backlogs, 234 Plays)
Suikoden II (2.4k Backlogs vs. 1.8k Plays)
Final Fantasy VI (6.3k Backlogs vs. 11k Plays)
Final Fantasy XII: The Zodiac Age (4.8k Backlogs vs. 5.8k Plays)
The Legend of Heroes: Trails in the Sky (3.6k Backlog vs. 5.4k Plays: Entire trilogy counts)
Tales of Symphonia (2.8 Backlogs vs. 4.8k Plays)
Cosmic Star Heroine (473 Backlogs vs. 363 Plays)
Phantasy Star IV: The End of the Millennium (783 Backlog vs. 660 Plays)
Fire Emblem Engage (3.5k Backlogs vs. 6.1k Plays)
Strider 2 (380 Backlogs vs. 723 Plays: Over 50%!)
Klonoa: Door to Phantomile (1,688 Backlogs vs. 3,870 Plays: About 43.6%)
Klonoa 2: Lunatea's Veil (1.1k Backlogs vs. 2k Plays)
Octopath Traveler (6.1k Backlogs vs. 9k Plays)
Fire Emblem: The Binding Blade (1,429 Backlogs vs. 3,273 Plays: Over 40%!)
Clockwork Knight (126 Backlogs vs. 184 Plays: 368 Total Logs)
Digimon Story: Cyber Sleuth (1.1k Backlogs vs. 2.3k Plays)
Dragon Quest II: Luminaries of the Legendary Line (602 Backlogs vs. 1,273 Plays: About 47%)
Metroid Prime 2: Echoes (3.2k Plays vs. 5.1k Plays)
The Liar Princess and the Blind Prince (214 Wishlists vs. 312 Plays)
Star Wars: Knights of the Old Republic II - The Sith Lords (3.4k Backlogs vs. 5.5k Plays)
Umineko no Naku Koro ni (2k Backlogs vs. 3.7k Plays)
Dusk Diver (242 Backlogs vs. 158 Plays: 509 Total Logs)
Drakengard 3 (2.6k Backlogs vs. 3.4k Plays)
Fire Emblem: Path of Radiance (2.7k Backlogs vs. 5k Plays)
Fire Emblem: Radiant Dawn (2.1k Backlogs vs. 3.2k Plays)
Bravely Default (3.2k Backlogs vs. 5k Plays)
Golden Sun (3.2k Backlogs vs. 5k Plays)
Golden Sun: The Lost Age (1.7k Backlogs vs. 2.3k Plays)
Ace Combat 3: Electrosphere (514 Backlogs vs. 777 Plays)
The Evil Within 2 (4.5k Backlogs vs. 6.2k Plays)
Hi-Fi Rush (7.7k Backlogs vs. 14k Plays)
Yomawari: Night Alone (356 Backlogs vs. 421 Plays)
Mega Man Legends (1.5k Backlogs vs. 2.5k Plays)
Mega Man Legends 2 (1k Backlogs vs. 1.1k Plays)
Freedom Planet (820 Backlogs vs. 1,713 Plays: About 48%)
Eternal Sonata (735 Backlogs vs. 969 Plays)
Omori (9.8k Backlogs vs. 17k Plays)
Valkyria Chronicles (2.2k Backlogs vs. 3.3k Plays)
Ender Lilies: Quietus of the Knights (2.2k Backlogs vs. 2.9k Plays)
Final Fantasy Tactics (2.9k Backlogs vs. 3.7k Plays)
Fuga: Melodies of Steel (514 Backlogs vs. 524 Plays)
ICEY (318 Backlogs vs. 633 Plays)
Chrono Trigger (9.8k Backlogs, 16k Plays)
Chrono Cross (3k Backlogs, 3k Plays)
The World Ends with You (4.9k Backlogs, 8.7k Plays)
Analogue: A Hate Story (247 Backlogs, 474 Plays)
Dragon Quest XI S: Echoes of an Elusive Age - Definitive Edition (5.5k Backlogs vs. 8.7k Plays)
Xenoblade Chronicles 3 (5.9k Backlogs vs. 8.8k Plays)
Fire Emblem: Genealogy of the Holy War (1.4k Backlogs vs. 2.2k Plays)

I'll do more later, but I got some other stuff to do right now. Also, Planescape: Torment is on the list twice right now.