Well, the only thing that you infer from Bioshock with regards to UT3 is graphics. Gameplay is going to be much different. All they share is the engine. And actually, the Bioshock people employed some people just to work on liquids.
Roboblitz also uses UE3. The play is nothing like unreal.
From Wikipedia all of these games use UE3:
# Aliens — (2009) Gearbox Software
# America's Army 3.0 — (2008) US Army
# APB — (2008) Webzen
# Black Powder Red Earth - (2007) Echelon Studios
# Brothers In Arms: Hell's Highway — (2007) Gearbox Software[35]
# BioShock - (2007) 2K Boston/2K Australia
# BlackSite: Area 51 — (2007) Midway Austin
# DC Comics MMO — (TBA) Sony Online Entertainment
# Earth No More — (2009) Recoil Games / 3D Realms
# Elveon — (2007) 10tacle Studios[36]
# Fatal Inertia — (2007) Koei[37]
# Frontlines: Fuel of War — (2008) Kaos Studios
# Fury — (2007) Auran[38]
# Gears of War — (2006) Epic Games
# Global Agenda — (TBA) Hi-Rez Studios[39]
# Hail to the Chimp — (2008) Wideload Games [40]
# Hour of Victory — (2007) Midway Games
# Huxley — (2008) Webzen Games[41]
# Interstellar Marines - (2008) Zero Point Software [42]
# The Last Remnant — (2008) Square Enix
# Lost Odyssey — (2007) Mistwalker[43]
# Mass Effect — (2007) BioWare[44]
# Medal of Honor: Airborne — (2007) Electronic Arts[45]
# Monster Madness: Battle for Suburbia — (2007) Artificial Studios[46]
# RoboBlitz — (2006) Naked Sky Entertainment[47]
# Rogue Warrior: Black Razor - (2007) Bethesda Softworks
# Stargate Worlds — (2007) Cheyenne Mountain Entertainment[48]
# Stranglehold — (2007) Midway Chicago[49]
# The Scourge Project — (N/A) Tragnarion Studios
# To End All Wars — (2008) Kuju Entertainment [50] [51]
# Tom Clancy's EndWar — (2008) Ubisoft
# Tom Clancy's Rainbow Six: Vegas — (2006) Ubisoft
# Turning Point: Fall of Liberty — (2007) Spark Unlimited
# Turok — (2008) Propaganda Games
# Undertow — (2007) Chair Entertainment
# Unreal Tournament 3 — (2007) Epic Games
# Upcoming Mortal Kombat 8 Game — (Unknown) Midway Games
# The Wheelman — (2007) Midway Games
# HEI$T — (2007) InXile Entertainment
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