You are Gordon Freeman... It was a normal working day. Scattered Xen aliens were hiding even in the rear corners of the Black Mesa research facility. It slowly return normality in everyday work. The old not been destroyed buildings have been modernized slowly. You return from a normal disposal order, as in parts of the institution the power goes out. Power generators to keep running on the main equipment and and your mission is to restore the energy supply. On the half way you notice more and more Xen returnes to Black Mesa and the military is back ... Uncover a new, exciting plot in the Half-Life universe!
Sorry, just 6 / 10. I think constructive criticism:
1) Most of the maps are optimized badly: placed in a large box, to avoid leaks.
2) hard difficulty in the shootings (in this game with a great slaughter of the enemies were never interested).
3) Uncomfortable places for changelevels (stuck in the wall more than once)
4) Annoying voice. Voice acting is repeated at the beginning of the level.