Steam
Half-Life: Opposing Force
100 · Official storeIn stock40h agoRegion US
$4.99
Half-Life: Opposing Force
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.
Nov 1, 1999Windows, Mac, Linux
ActionAdjustable DifficultyCustom Volume ControlsFamily SharingMulti-playerPlayable without Timed InputSave AnytimeSingle-playerValve Anti-Cheat enabled
Tracked stores
1
Best indexed price
$4.99
Review signal
No reviews
Current low target
$4.99 · matches the current indexed low
Compare Sellers
Best indexed price: $4.99 at Steam.
1/1
Open
How trust is scored: KeyDwarf combines source type, known retailer posture, marketplace risk, activation-region warnings, and source transparency. Checkout and support still happen with the external seller.
Price History
All-time low
$4.99
Jun 18, 2026 · Steam
12-week avg
$4.99
2 recent observations
Current vs low
At low
Current $4.99
Recommendation
At indexed low
current indexed price matches the low
Lowest indexed daily price per currency. KeyDwarf tracks listings and does not sell keys.
Images and Media
Frequently asked
Where is Half-Life: Opposing Force cheapest right now?
Half-Life: Opposing Force is currently indexed at $4.99 from Steam. Official Steam Store listing.
What is the historical low for Half-Life: Opposing Force?
The indexed low for Half-Life: Opposing Force is $4.99 from Steam, observed Jun 18, 2026. The current indexed price is at that low, so KeyDwarf labels it "At indexed low".
Is the top source safe?
Steam is labeled "Official store" in the index. KeyDwarf tracks the listing and source risk, but checkout and support stay with the external store.
What is the review signal?
No review summary is indexed for this game yet.
Can KeyDwarf notify me about a lower price?
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