HKX - themeldingwars/Documentation GitHub Wiki Havok behavior file format. Firefall uses basic HKX files which can be opened within the Havok Content Tools Standalone or Plugin viewers. The Plugins support Max, Maya, and XIS. Tools Havok Content Tools 64Bit Havok Content Tools 32Bit hkxcmd ⚠️ **GitHub.com Fallback** ⚠️