Valiant Classic Omnibuses is a Humble Bundle of PDF graphic novels from the earlier Valiant Universe (pre 2005 when they relaunched their titles and which is also the period covered in the Valiant Universe RPG). Descriptions from mycomicshop.com as Humble Bundle disables selecting text.

This is $18 for 7 omnibus PDFs and originally hardcovers.

• Quantum and Woody The Complete Classic Omnibus (Oct 2014) - "Collects Quantum and Woody (1997-2000) #0, 1-21 and 32, The Goat H.A.E.D.U.S. Special Event (1998 Quantum and Woody) #1, and X-O Manowar (1996-1998 2nd Series) #16."
• X-O Manowar Classic Omnibus (Jan 2015) - "Collects X-O Manowar (1992-1996 1st Series) #0-30, Armorines (1994-1995 1st Series Valiant) #0, X-O Database (1993) #1, as well as material from Secrets of the Valiant Universe (1994-1995) #1"
• Archer and Armstrong The Complete Classic Omnibus (Jan 2016) - "Collects Archer and Armstrong (1992-1994) #0-26, Eternal Warrior (1992-1996) #25, Chaos Effect: Omega (1994), and the story THE FORMATION OF THE SECT."
• Ninjak The Complete Classic Omnibus (Feb 2018) - "Collects Ninjak (1994 1st Series) #1-26, #0, and #00, Ninjak Yearbook (1994), Bloodshot (1993-1996 1st Series) #5-6, and Bloodshot (1993 1st Series) (1993) #5."
• Bloodshot Classic Omnibus (Sep 2019) - "Collects Bloodshot (1993-1996 1st Series) #0-24, Rai (1992-1995) #0, Eternal Warrior (1992-1996) #5 and 14-16, Secret Weapons (1993-1995) #3, 9-10 and 13, and HARD Corps (1992-1995) #5."
• Shadowman Classic Omnibus (Oct 2021) - "Collects Shadowman (1992-1995 1st Series) #0-24, The Second Life of Doctor Mirage (1993-1995) #5, Secret Weapons (1993-1995) #1-2, and Darque Passages (1994 Valiant)."
• Eternal Warrior Classic Omnibus (Oct 2022) - "Collects Eternal Warrior (1992-1996) #1-25, Eternal Warrior Yearbook (1993) #1, Archer and Armstrong (1992-1994) #25, Harbinger (1992-1995) #32, Secret Weapons (1993-1995) #3 and 6-10, and Valiant Era Companion (1993)."

Looking at the contents there is still much missing but I guess this is all Valiant has reprinted so far.