Half-Life: Opposing Force
Half-Life: Opposing Force costs $4.99 USD on Steam (price as of July 2026). To pay as little as possible, compare that against the live offers from key marketplaces Instant Gaming and G2A below: their prices change constantly, so we link straight to each store instead of showing a number that goes stale.
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What is Half-Life: Opposing Force?
What platforms is Half-Life: Opposing Force on?
The PC version of Half-Life: Opposing Force is bought as a digital key — that's what we compare store by store on Games Deal Radar.
How to get Half-Life: Opposing Force at the best price?
Before buying Half-Life: Opposing Force, take a minute to compare action prices: digital keys often land below the official store price. Even though it's already a budget game, you can still shave a bit off by buying the key in the right place. With a Metacritic score of 90, it's one of the best-rated in its category, so locking in a good price is doubly worth it. Since it launched in 1999, it shows up in sales often, especially on third-party keys. Always make sure the store is trustworthy and the key is valid for your region before paying.
