Episode 1 of the first expansion for Quake 4, created by Benjamin Pulido.
The episode 1 contains:
mission 1: The Strogg Base
mission 2: The Strogg Machinery
mission 3: The Strogg Waste
mission 4: Strogg Intoxication
mission 5: The Sewers
mission 6: The Mines
mission 7: The Desert
mission 8: The Secret Base
*Classic Skins from Quake 2, monsters and weapons.
*Classic Sounds and music in some maps from quake 2 and quake 3 arena.
Extract the folder q4exp to idsoftware/quake4, and load the mission pack in mods menu, and enjoy!