S.T.A.L.K.E.R.: Clear Sky vs System Shock® 2 (1999)
Which one is worth buying now, with today's prices and each game's recommendation.
S.T.A.L.K.E.R.: Clear Sky wins 5 of 9 head-to-head metrics. S.T.A.L.K.E.R.: Clear Sky is R$98.31 cheaper.
Metric by metric
The winner of each row gets a ✓. No row weighs more than another; the recommendation is calculated separately.
| Metric | S.T.A.L.K.E.R.: Clear Sky | System Shock® 2 (1999) |
|---|---|---|
| GameValio scoreRecommendation: Maybe × Maybe | 56 | 58 |
| Quality | 81 | 94 |
| Value | 40 | 40 |
| Popularity | 34 | 31 |
| Steam Review Score | 85.6% positive | 94.3% positive |
| Average Concurrent Players (14 days) | 69 | 5 |
Where to buy
The 3 cheapest stores for each game
S.T.A.L.K.E.R.: Clear Sky
System Shock® 2 (1999)
Side by side over time
S.T.A.L.K.E.R.: Clear SkySystem Shock® 2 (1999)
Details and requirements
| Item | S.T.A.L.K.E.R.: Clear Sky | System Shock® 2 (1999) |
|---|---|---|
| Release date | September 15, 2008 | May 10, 2013 |
| Developers | GSC Game World | Nightdive Studios, Looking Glass Studios |
| Publishers | GSC World Publishing | Nightdive Studios |
| Platforms | Windows | Windows, MacOs |
| Supported OS (minimum) | Microsoft® Windows® XP/Vista (SP1) | — |
| Processor (minimum) | Intel Core 2 Duo E6400 / AMD 64 X2 4200+ | — |
| Graphics (minimum) | 256 MB DirectX® 9.0c compatible card* / nVIDIA® GeForce™ 8800 GT / ATI Radeon® HD 2900 XT | — |
| Memory (minimum) | 2 GB RAM | — |
| Sound (minimum) | DirectX® 9.0 compatible sound card | — |
| Hard Drive (minimum) | 10 GB free hard disc space | — |
Frequently asked questions
Which is better: S.T.A.L.K.E.R.: Clear Sky or System Shock® 2 (1999)?
S.T.A.L.K.E.R.: Clear Sky won the comparison against System Shock® 2 (1999) based on the head-to-head metric breakdown. Check the metrics table above for a full side-by-side analysis.
How is the comparison calculated?
The comparison winner is determined objectively by counting which game wins more individual metrics in the head-to-head table. No weighting is applied. The GameValio Recommendation shown separately is our own suggestion for each game, based on a weighted score that combines quality (reviews), popularity (player counts), and affordability (price vs value) into a score out of 100. These are two different things: the comparison is objective, the recommendation is GameValio's opinion.
Is S.T.A.L.K.E.R.: Clear Sky worth buying over System Shock® 2 (1999)?
Based on the metrics, S.T.A.L.K.E.R.: Clear Sky won the direct comparison. However, also check the GameValio Recommendation for each game and the price comparison table to make the most informed purchase decision.
Which game has better player reviews?
Review score trends and volume over time are shown in the charts section above. The game with consistently higher positive ratios has stronger community reception.
Which game offers better value for money?
The affordability score and price comparison table above highlight the best deals. Too close to call currently scores better on value relative to its quality and price.
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Analysis updated: Oct 24, 2026, 05:43 PM UTC