The Hour Before Dawn mod for Half-Life 2

Taken directly from the about section of the site:

The Hour Before Dawn is a story-driven singleplayer modification for Half-Life 2. Spanning multiple accounts of ordinary people retaliating to an all-out alien invasion of Earth, survivors find themselves picking up whatever they can to fend off the unrelenting attack on our homeland. Through a complex storyline involving many compelling characters and many interesting twists, these same survivors uncover that they aren't the only ones fighting for survival- banding up with other people- and find their lives intertwining with others' lives in unexpected ways. That's where the player comes in. At the beginning of the game, players will choose which party to play as, and then, branching out to the character selection screen, which character to play as. Although many parties will come across the others during the game, each group, and subsequently each character will have a different experience, thus giving the mod a unique replay value. Taking from games like Final Fantasy VII, music will play an important part in illustrating each character's background, and will help emphasize cutscenes and important parts of the story. Gameplay will be similar to games like Halo, Eternal Darkness: Sanity's Requiem, and the original Half-Life. Unlike other First-Person Shooters, The Hour Before Dawn will use spells (which will be similar to those in the Final Fantasy series).