Has Anyone Earned 100 Platinum Trophies on PS3?

Extremely unlikely. Barriers:

• Library Size: ~1,800 PS3 games total; ~1,000 with trophy support (mandatory post-2009).
• Platinum Difficulty: Many require 100+ hours, online trophies (servers dead), or extreme skill (Wipeout HD, Ninja Gaiden Sigma 2, Super Meat Boy).
• Time: 100 plats × avg 50h = 5,000 hours = 2+ years full-time.
• No Public Leaderboard: Sony doesn't publish platinum counts. Sites like PSNProfiles track ~4M users; top hunter has ~2,500 plats across PS3/4/5/Vita. PS3-only tops ~300–400.

Closest Verified

Top PSNProfiles PS3-only hunters: ~350 plats. 100 is achievable for a dedicated hunter over 5–10 years, but no public record of exactly 100 on PS3 alone as a milestone.

If you're hunting, focus on easy plats (Hannah Montana, My Name is Mayo, Ratalaika games)—but that's a different hobby.