This week’s PS Store update is one of the largest in recent memory. All kinds of good stuff is now available for purchase and/or download, and the three big hitters are: the CoD 4 Variety Map Pack (357 MB, $9.99), the echochrome demo (34 MB), and the first full album for Rock Band (Judas Priest’s Screaming For Vengeance; 279 MB, $14.99).

Speaking of music games, Guitar Hero III has added a Def Leppard pack (378 MB, $6.25). It includes live versions of “Rock of Ages” and “Photograph” alongside the band’s new single, “Nine Lives”. In addition, Karaoke Revolution Presents: American Idol Encore gets 43 new songs at $1.49 each (the full list is after the jump). Want more DLC? You’ve got it: there’s a suspiciously-sized second expansion pack for The Eye of Judgment (118 KB, $14.99) and an Army of Two map pack (378 MB, $7.49).

Finally, Dale complained last week about the lack of PSOne titles, and it seems that Sony heard his pleas. From the 22nd century comes one of the hardest games of all time, the classic arcade shooter R-TYPE. But for extra difficulty, it’s included with its sequel, R-TYPE II, in a package that was released on the PSOne as R-TYPES — and the 243 MB download is still only $5.99!

I had to include the rest of the content after the jump; that’s how massive this update is.

[Via PlayStation.Blog — thanks, Justin!]

Now, on to the free stuff! In addition to echochrome, there’s the Iron Man demo (948 MB) that’s been out on Xbox Live for a week now. As for videos, there are loads. Game videos include: the Resistance 2 teaser; a GT 5 Prologue “Techno” video; a teaser for the Army of Two map pack; a FIFA 08 “Features” video; trailers for Iron Man and Prototype; two parts of a Burnout Paradise-related interview with Wyclef Jean, and a behind-the-scenes look at the music video for his song “Fast Car”; and finally, a trailer for the Coachella Music Festival.

Whew! The section for movie-related and Blu-ray Disc-related videos has two new additions: trailers for 88 Minutes and The Water Horse. We also have a second theme for The Eye of Judgment, and four GT 5 Prologue wallpapers.

In addition to the aforementioned R-TYPES, the PlayStation Store for PC gets LocoRoco ($21.99) and Kingdom of Paradise ($10.99). In the way of videos, PSP/PC users can download trailers for their two exclusive games, as well as a “Command” trailer for R-TYPE. Lastly, you can access some more free content: seven wallpapers (two for LocoRoco and five for Kingdom of Paradise), and a music track from LocoRoco entitled “Nightmare”.

Here’s the 43-track deluge of DLC for Karaoke Revolution Presents: American Idol Encore:

• • Broken Wings - Mr. Mister
• • China Grove - The Doobie Brothers
• • Cry - Faith Hill
• • Does He Love You - Reba McIntire & Linda Davis
• • Drive - Incubus
• • Dust in the Wind - Kansas
• • Endless Love - Diana Ross & Lionel Richie
• • Every Breath You Take - The Police
• • Everybody Wants to Rule the World - Tears for Fears
• • Fly - Hilary Duff
• • Good Ol’Boys - Waylon Jennings
• • Headstrong - Trapt
• • Heartbreak Hotel - Elvis Presley
• • Hold On - Good Charlotte
• • Hot Stuff - Donna Summer
• • How Do I Live - Leann Rimes
• • I Don’t Wanna Be - Gaven DeGraw
• • I Will Survive - Gloria Gaynor
• • If You Could Only See - Tonic
• • I’ll Be There - The Jackson 5
• • Independence Day - Martina McBride
• • I’ve Got You Under My Skin - Frank Sinatra
• • Joy to the World - Three Dog Night
• • Lady Marmalade - Patti Labelle
• • Material Girl - Madonna
• • Meant to Live - Switchfoot
• • Miss You - Aaliyah
• • Pieces of Me - Ashlee Simpson
• • Sittin’ on the Dock of the Bay - Otis Redding
• • Someday - Nickelback
• • Start Me Up - Rolling Stones
• • Stop! In the Name of Love - Dina Ross & The Supremes
• • Take On Me - A-Ha
• • The Reason - Hoobastank
• • The Tracks of My Tears - Smokey Robinson & The Miracles
• • This Old Heart of Mine (Is Weak for You) - The Isley Brothers
• • Time After Time - Cyndi Lauper
• • Turn the Beat Around - Vickie Sue Anderson
• • We Are Family - Sister Sledge
• • What Becomes of the Broken Hearted - Jimmy Ruffin
• • Why Can’t I - Liz Phair
• • Wind Beneath my Wings - Bette Midler
• • You’re the One that I Want - John Travolta & Olivia Newton John

Massive update is massive, eh? What are you planning on downloading this week?