Return and relive the Black Mesa incident through the eyes of Sgt. Jordan Foster, a Security Guard battling for survival through the Xen invasion in search of Dr Cross. Find Dr Cross, protect her at all cost, and maybe you'll just have a chance to get out of this whole mess alive. Half-Life: Crossfire was a passion project I started during early 2020 when lockdown restrictions first hit the UK. What started as a simple exploration of the Spirit of Half-Life toolset has now turned into a full mod/obsession being developed on the XashXT Engine.