MINERVA: Metastasis

MINERVA: Metastasis screenshots

Minerva: Metastasis is one of the best single player storylines for HL2
Control Center
MINERVA: Metastasis 2.0 : Control Center

Alternative downloads

Half-Life Visitors
1.0
FREE
Half-Life Visitor puts you in the shoes of a visitor in Black Mesa.
Half-Life 2: CTF
2.1
FREE
Half-Life 2 CTF has all the fun you expect from a Capture The Flag game.
Half-Life : INVASION
1.1.1.1
FREE
After Half-Life, enter Invasion, its single-player mod.