Simplify the following text for a Grade 8 native English-speaking person.
Original: The soundtrack for The Orange Box consists of music that Valve employees composed for Half-Life 2 : Episode One , Half-Life 2 : Episode Two , Portal , and Team Fortress 2 .
Simplified: It has five games on it - Half-Life 2 , Half-Life 2 : Episode One ( an expansion of Half-Life 2 ) , Half-Life 2 : Episode Two ( another expansion of Half-Life 2 , Portal , and Team Fortress 2 . The first two were released outside of The Orange Box , but the other three first appeared in it .