It only works with the vanilla Q2 engine from what I can tell, and the experiences of the beta-testers. Most likely due to the Lazarus DLL which I have modified quite a lot (so it won't even work with KMQ2, which has Lazarus support).
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Mercy is for the weak. Here, in the streets, in competition: A man confronts you, he is the enemy. An enemy deserves no mercy.