You play as Thomas Redgrave. A scientist working in Area3 Research labs. The story is parallel with the events in Black Mesa, the same day when Gordon Freeman and Scientists in Sector C started the whole event.
Every mod has its level design leave a flavor particular to its designers tastes. This one is alot like valve's Black Mesa, theres even 2 areas where you get to revisit.
The beginning was a little on the hard side as you had to deal with aliens with a axe. And it stays that way for a little while before you finally find a ammo room which makes alot of sense to me.
Most mods give you guns straight away with the crowbar and I've never thought that realistic, weapons and ammo should be in storage or on a dead guard. Thumbs up for that.
Most fights are a little to easy but Half-Life was like that mostly.
Most areas are all broadly lit I noticed and its a shame to see that lighting wasn't really used well.
Some unique scenes like a prototype vehicle and a falling elevator where nice, other people have had issues but not me, no glitches or bugs of any kind.
Some areas could have had more detail but its length is decent so I guess it would have required a fair bit of polishing. And I have to admit I cringed at gman talking in the end :D