The list of compatible handsets isn't mentioned anywhere on the actual store listing for Knowledge is Power, so as far as I'm concerned, it's still their problem - The listing literally just says "all you need is a mobile".
(Also, that listing is only for phones compatible with the That's You! companion app, because for some insane reason they all have different compatibility requirements )
The Last of Us™ Remastered Fallout 4 The Last Guardian™ Assassin’s Creed® IV Black Flag™ – Standard Edition Assassin’s Creed® Unity Assassin’s Creed® Syndicate WipEout™ Omega Collection Far Cry 4 Far Cry Primal Gravity Rush™ 2 Until Dawn™ 7 Days to Die God of War® III Remastered The Order: 1886™ Trackmania® Turbo DIVINITY ORIGINAL SIN – ENHANCED EDITION Digimon Story Cyber Sleuth – Digital Edition Batman: Return to Arkham Prey Zombie Army Trilogy J-Stars Victory VS+ Digital Edition WRC 6 FIA World Rally Championship Sherlock Holmes : The Devil’s Daughter Killing Floor 2 Tales of Zestiria – Digital Standard Edition Alien: Isolation – The Collection FlatOut 4: Total Insanity Broken Sword 5 – the Serpent’s Curse Darksiders: Fury’s Collection – War and Death Yooka-Laylee Saint Seiya: Soldiers’ Soul THE KING OF FIGHTERS XIV Guilty Gear Xrd -Sign- ArcaniA – The Complete Tale Constructor Game Firefighters – The Simulation Mordheim: City of the Damned Forestry 2017 – The Simulation Danganronpa 1/2 Reload Danganronpa Another Episode: Ultra Despair Girls Get Even Industry Giant 2 Shiness: The Lightning Kingdom SteinsGate 0 Valhalla Hills – Definitive Edition EARTH’S DAWN Zero Escape: Zero Time Dilemma Tokyo Twilight Ghost Hunters: Daybreak Special Gigs Cladun Returns: This Is Sengoku! PaRappa the Rapper, LocoRoco, Patapon Remaster Collection Rabi-Ribi
I'm not sure how many GRcadians wouldn't already have them, but I'd suggest that any two from The Last of Us Remastered, Fallout 4, The Last Guardian, Assassin's Creed Syndicate, Wipeout Omega Collection, Prey and Alien Isolation could prove to be a lot of decent gaming for twenty-five wraps.