Another big update, as it's been a couple of weeks since the last one. But I've also got another addendum to make:
AAbalaburn: The Battle Legend of Asterica (PS1) - Displays your playtime in hours/minutes/seconds on your save slot in Adventure mode.
Alundra (PS1) - Displays your playtime in hours/minutes on your save slot.*
Armored Core 4 (PS360) - Displays your playtime in hours/minutes/seconds on your save slot.*
Avalon Code (DS) - Displays your playtime in hours/minutes, but only when saving or loading.*
Away: Shuffle Dungeon (DS) - Displays your playtime in hours/minutes on the top screen, and on your save slot*
B-CBrave Prove (PS1) - Displays your playtime in hours/minutes on your save slot.*
Breath of Fire III/IV (PS1) - Displays your playtime in hours/minutes on your save slot.*
Castlevania: Harmony of Despair (PS360) - Displays your playtime in hours/minutes/seconds on your save slot.* (displays playtime for each character)
Cyber-Org (PS1) - Displays your playtime in hours/minutes/seconds on your save slot.*
DDeep Freeze (PS1) - Displays your playtime in hours/minutes/seconds on your save slot.*
Demon's Souls Remake (PS5) - Displays your playtime in hours/minutes/seconds on your save slot.*
Digimon Story Cyber Sleuth: Hackers Memory (Vita/PS4/Switch) - Displays your playtime in hours/minutes on your save slot.*
Digimon World 2 (PS1) - Displays your playtime in hours/minutes on your save slot.*
Digimon World: Next Order (Vita/PS4) - Displays your playtime in hours/minutes/seconds on your save slot.*
Dragon Ball Z: Attack of the Saiyans (DS) - Displays your playtime in hours/minutes on your save slot.*
Dragon Ball Z: Extreme Butouden (3DS) - Displays your playtime in hours/minutes/seconds, but only when loading your save from the title screen.*
Dragon Quest Heroes I/II (PS3/PS4/Switch) - Displays your playtime in hours/minutes on your save slot.*
E-FElebits: The Adventures of Kai and Zero (DS) - Displays your playtime in hours/minutes, but only when loading your save from the main menu.*
Eternal Sonata (PS360) - Displays your playtime in hours/minutes/seconds on your save slot.*
Final Fantasy I (PSP) - Displays your playtime in hours/minutes on the pause menu, and on your save slot.*
Final Fantasy Type-0 HD (PS4/Xbox One) - Displays your playtime in hours/minutes/second on the pause menu, and on your save slot.*
Fist of the North Star: Lost Paradise (PS4) - Displays your playtime in hours/minutes/seconds in the pause menu.*
GGod of War (PS2/PS3/Vita) - Displays your playtime in hours/minutes/seconds on your save slot.*
Golden Sun/Golden Sun: The Lost Age (GBA) - Displays your playtime in hours/minutes on your save slot.*
Golden Sun: Dark Dawn (DS) - Displays your playtime in hours/minutes on your save slot.*
Grandia (Saturn/PS1/Switch) - Displays your playtime in hours/minutes/seconds on your save slot.*
Grandia II (Dreamcast/PS2/Switch) - Displays your playtime in hours/minutes/seconds on your save slot.*
L-MThe Legend of Dragoon (PS1) - Displays your playtime in hours/minutes/seconds on the pause menu, and on your save slot.*
Lufia 2: Rise of the Sinistrals (SNES) - Displays your playtime in hours/minutes on your save slot.*
Mega Man 11 (PS4/Xbox One/Switch) - Displays your playtime in hours/minutes on your save slot.* [originally suggested by
dsparil ]
Mercenaries 2: World in Flames (PS360) - Displays your playtime in hours/minutes/seconds on your save slot.*
Monster Tale (DS) - Displays your playtime in hours/minutes on the pause menu, and when loading your save.*
The Mummy Demastered (PS4/Xbox One/Switch) - Displays your playtime in hours/minutes/seconds, but only when loading your save from the main menu.*
NNights of Azure 2: Bride of the New Moon (Vita/PS4/Switch) - Displays your playtime in hours/minutes/seconds on your save slot.*
Ninja Gaiden 2 (360) - Displays your playtime in hours/minutes/seconds on your save slot.*
Ninja Gaiden Sigma 1/2 (multi) - Displays your playtime in hours/minutes/seconds on your save slot.*
Ninja Gaiden 3: Razor's Edge (multi) - Displays your playtime in hours/minutes/seconds in Ninja Records.
Nostalgia (DS) - Displays your playtime in hours/minutes on the pause menu, and on your save slot.
O-ROne Piece: World Seeker (PS4/Xbox One) - Displays your playtime in hours/minutes on your save slot.*
Project X Zone (3DS) - Displays your playtime in hours/minutes/seconds on your save slot.
Project X Zone 2 (3DS) - Displays your playtime in hours/minutes/seconds on your save slot and the in-game menu between missions.*
Recettear: An Item Shop's Tale (PC) - Displays your playtime in hours/minutes/seconds on your save slot.*
Resident Evil 7: Biohazard (multi) - Displays your playtime in hours/minutes/seconds on your save slot.*
S-TStar Ocean: The Second Story (PS1) - Displays your playtime in hours/minutes on the pause menu, and on your save slot.*
The Surge (PS4/Xbox One) - Displays your playtime in hours/minutes, but only when loading your save from the main menu.*
Sword of Mana (GBA) - Displays your playtime in hours/minutes on your save slot.
Tales of Berseria (PS3/PS4) - Displays your playtime in hours/minutes/seconds on the pause menu, and on your save slot.*
Terranigma (SNES) - Displays your playtime in hours/minutes on your save slot.*
Trails of Cold Steel IV (PS4/Switch/Stadia) - Displays your playtime in hours/minutes/seconds in the pause menu.*
WWild Arms 2 (PS1) - Displays your playtime in hours/minutes on your save slot.*
Wild Arms: Alter Code F (PS2) - Displays your playtime in hours/minutes/seconds on your save slot.*
World of Final Fantasy (multi) - Displays your playtime in hours/minutes/seconds on the pause menu, and on your save slot.*
X-ZXenogears (PS1) - Displays your playtime in hours/minutes/seconds on the pause menu, and on your save slot.*
Xenosaga Episode I/II/III (PS2) - Displays your playtime in hours/minutes/seconds on the pause menu, and on your save slot.*
Yakuza Kiwami (PS3/PS4/Xbox One) - Displays your playtime in hours/minutes on the stats screen in the pause menu.*
Yakuza Kiwami 2 (PS4/Xbox One) - Displays your playtime in hours/minutes/seconds on in the Results screen.*
Yakuza 3/4 (PS3/PS4/Xbox One) - Displays your playtime in hours/minutes on the stats screen in the pause menu.*
Yakuza 5 (PS3/PS4/Xbox One) - Displays your playtime in hours/minutes/seconds on your save slot, and in hours/minutes on the stats screen in the pause menu.*
Yakuza 6 (PS4/Xbox One) - Displays your playtime in hours/minutes/seconds on in the Results screen.*
Yakuza 0 (multi) - Displays your playtime in hours/minutes on the stats screen in the pause menu.*
Yakuza Dead Souls (PS3) - Displays your playtime in hours/minutes/seconds, but only when loading your save from the main menu.*
Zone of the Enders: The 2nd Runner (multi) - Displays your playtime in hours/minutes/seconds on your save slot.