Heh, Well I just now did a recount of all UE3 titles (that I know of). 33 active titles and counting! The only other engine that was ever used this heavily in seperate commercial games was the Q3 engine. And it never got this many titles. Let alone, no UE3 title has yet to be released even:

# All Points Bulletin — Real Time Worlds
# America's Army v3.0 — U.S. Army
# America's Army: Real Heroes — (PS3 and Xbox 360) — U.S. Army
# Assassin's Creed — Ubisoft
# BioShock - Irrational Games
# Brothers in Arms: Hell's Highway — Gearbox Software
# Empire - Chair Entertainment
# Endless Saga — Webzen Games Inc.
# Elveon — 10Tacle
# Frame City Killer — Namco (CANCELLED)
# Gears of War — (2006) Epic Games
# Huxley — Webzen Games Inc.
# Indiana Jones — LucasArts
# Interstellar Marines - Zero Point Software
# Lineage III — NC Soft
# Lost Odyssey — Mist Walker / Feel Plus
# Magna Carta 2 — Softmax
# Marble Comics Online — Sigil Games Online
# Mass Effect — BioWare
# Parabellum - ACONY
# Project IM — (unknown) Zero Point Software
# Project New Jersey — Obsidian Entertainment
# Roboblitz — Naked Sky Entertainment
# Section 8— Timegate Studios
# Stranglehold — Tiger Hill Entertainment
# Swat 5 — VUG
# Tom Clancy's Firehawk — Ubisoft
# Tom Clancy's Rainbow Six: Vegas(PS3, Xbox 360 version) — Ubisoft
# Tom Clancy's Rainbow Six 5(PC version) — Ubisoft
# Tom Clancy's Splinter Cell 5 — Ubisoft
# Too Human — Silicon Knights
# New Turok (placeholder title) — Buena Vista Games
# Unreal Tournament 2007 — Epic Games
# Vanguard: second expansion pak — Sigil Games Online

Keep in mind there are numerous other companies that have acquired the UE3 license and have not announced a title yet.

 

An engine does not make the game good, but this engine ensures the game will at least look damn friggin beautiful.