Tomb Raider: Underworld Tomb Raider: Underworld for Nintendo PC by Eidos resumes where Tomb Raider: Legend left off and introduces a new, interactive playing environment Lara Croft explores a wide array places, such as the Arctic, Mexico, and beneath the Mediterranean Sea Environment is much more realistic and interactive -- footprints will be left in mud, for example, but only until it rains and then they will wash away Melee combat system that requires players to strategically strike with offensive, defensive, and evasive maneuvers Improved AI allows enemies and animals to make decisions based on surroundings, employ ambush and squad tactics, and even retreat if deemed necessary Tomb Raider: Underworld for Nintendo PC by Eidos resumes where Tomb Raider: Legend left off and introduces a new, interactive playing environment Lara Croft explores a wide array places, such as the Arctic, Mexico, and beneath the Mediterranean Sea Environment is much more realistic and interactive -- footprints will be left in mud, for example, but only until it rains and then they will wash away Melee combat system that requires players to strategically strike with offensive, defensive, and evasive maneuvers Improved AI allows enemies and animals to make decisions based on surroundings, employ ambush and squad tactics, and even retreat if deemed necessary