Series' you own several installments of that you've NEVER PLAYED?

[Emperor Megas]

What are some series' that you've amassed several installments and have yet to play ANY of them? I have a tendency to purchase each game in a series if I've fond of any single installment, but then there are some games that I've never actually gotten around to playing any of, but own, and based on the fact that the original I purchased seemed appealing, have purchased other installments in good faith.

The 'Where's the Disgaea 4 love' thread in Modern Gaming got me thinking about this. I own Disgaea: Hour of Darkness, Disgaea 2: Cursed Memories, and Disgaea 3: Absence of Justice, but I've never played any of them. I purchased them all for less than $20 each, so I'm not out much, but there's actually a chance that I may hate the series after investing somewhat heavily into it (relatively).

There are several popular series' that I've never even tried, but own quite a few (if not all) installments of. Especially last generation. Just a few others are:

• Ace Combat 3, AC04: Shattered Skies, AC5: The Unsung War
• Atelier Iris, AI2: The Azorth of Destiny, AI3: Grand Phantasm
• Colony Wars, Colony War: Vengence, CW III: Red Sun
• Tecmo's Deception, Kagero: Deception 2, Deception III, Trapt
• Dynasty Warriors 2, DW3, DW4, DW5: Empires
• God of War, GoW II, GoW: Chains of Olympus
• Grand Theft Auto, London, 2, III, Vice City, Liberty City Stories
• Hitman Trilogy
• Jak and Daxter, Jak 2, Jak 3
• Kessen, II, III
• Prince of Persia: The Sands of Time, PoP: Warrior Within, Pop: The Two Thrones, PoP (360), PoP: The Forgotten Sands, PoP: The Fallen King
• Ratchet and Clank, Ratchet Deadlocked, R&C: Going Commando, R&C: Up Your Arsenal
• Road Rash, II, III
• SMT: Persona, SMT: FES Persona 3, SMT: Devil Summoner, SMT: Devil Summoner 2, SMT: Nocturne
• Sly Cooper and the Thievious Raccoonous, SC2: Band of Thieves, SC3: Honor Among Thieves
• Splinter Cell, SC: Chaos Theory, SC: Pandora Tomorrow, SC: Double Agent, SC: Essentials
• Spyro the Dragon, Spyro 2: Ripto's Rage, Year of the Dragon
• Suikoden, III, IV, V, Tactics
• Tomb Raider, II, III, TR: Chronicles, TR: The Angel of Darkness, TR: Underworld
• Trauma Center: Under the Knife, TC: Second Opinion, Trauma Team

I won't bother listing any of the unplayed ones I have only 2 installments of (which isn't quite as bad, really). Anyone else here in the same position?

In truth, I've played less than an hour of Prince of Persia: The Sands of Time, Grand Theft Auto III and Splinter Cell, but I barely think that counts. I own all of the Devil May Cry games as well, but I've played about half of the original, so I consider myself somewhat versed in that series.