Unused categories

The following category pages exist, although no other page or category makes use of them.

Showing below up to 13 results in range #1 to #13.

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1. 1997 Press Disc
2. 2007 Particle Benchmark
3. Counter Strike 1.6
4. Counter Strike GO
5. Counter Strike Source
6. E3 2003 images
7. Half-Life 1 eras
8. Half-Life 2 maps
9. Left 4 Dead 1
10. Left 4 Dead 2
11. Pages using invalid self-closed HTML tags
12. Portal 1 eras
13. Team Fortress Classic

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