Half-Life: Opposing Force — Add07

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About this game

Steam reviews

Overwhelmingly Positive

95% positive · 29,075 reviews

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Return to the Black Mesa Research Facility as one of the military specialists assigned to eliminate Gordon Freeman. Experience an entirely new episode of single player action. Meet fierce alien opponents, and experiment with new weaponry. Named 'Game of the Year' by the Academy of Interactive Arts and Sciences.

Released1 Nov, 1999

DeveloperGearbox Software

PublisherValve

Played since2026

Tags and features

ActionSingle-playerMulti-playerCustom Volume ControlsAdjustable DifficultyPlayable without Timed InputSave AnytimeFamily Sharing

Recent sessions

1 recorded session · 16m tracked

Friday, Oct 2

10:06 AM

16m

See all sessions for this game

#49

of 80 games

Playtime

Of all playtime

Sessions

2026

Played since

Half-Life: Opposing Force contributes to Lone Wolf and Adrenaline through solo play, action.

Greatest moments

Peak MonthOct 2026 · 16m

Achievement ProgressN/A

Session patterns

Quick Bursts

Usually occasional, most often on fridays.

Avg session16m

FrequencyOccasional

Favorite timeMornings

Favorite dayFridays

Gamer DNA impact

Lone Wolf

Strong

Solo play, self-reliant, single-player worlds

FromSingle-player

Adrenaline

Moderate

Fast reflexes, combat, and high-octane action

FromAction