Okay, well it's not a minecart, but it's a train. That'll do me. Not even my l33t skillz can escape death on occasion. Bit tough in places.
First level is poor.
Mugwum You are Gordan Freeman. On your quest to the Lambda Lab, you find another one of the Black Mesa's nuclear weapon storage facilities. This one is different though, a rogue group of military has stormed the building, and plans to detonate the weapon to rid the Alien invasion. You, becoming aware of this, must deactivate the nuclear device to save the innocent scientists, and to prevent the destruction of the Black Mesa's vast amounts of data, research and information. Just another day at the office for Gordon, then.