Achievement guide
Half-Life: Opposing Force
Friends who own it
Akuma7100.3h total
Bird0h total
Faith0h total
Kandles0h total
OverkillHD0h total
Paradoxaurs11.9h total
RangeValley5.9h total
Rusty0h total
TWK0h total
Taledon0h total
Tatuman0h total
TonyyJB0h total
XEALEEN0.4h total
Akuma7100.3h total
Bird0h total
Faith0h total
Kandles0h total
OverkillHD0h total
Paradoxaurs11.9h total
RangeValley5.9h total
Rusty0h total
TWK0h total
Taledon0h total
Tatuman0h total
TonyyJB0h total
XEALEEN0.4h total
This game has no Steam achievements.