Recent reviews by NaTe;

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I started playing around OB32, it was a fantastic game with a moderate to high skill ceiling, fun mobility and (mostly) good balancing between characters.
It maintained this great gameplay until around OB42-43 when they started to go downhill.
With OB64, HiRez has gone back to their shady practices, and are doing the same as what they did with Tribes.
Don't bother with this game.

What Valve and Bethesda have done with the new paid modding system is very frightening.
The future of PC gaming and modding is at stake with these changes.