Operation: Black Mesa is a total Source remake of Half Life: Opposing Force. Using the Source engine, the developers plan to recreate the Black Mesa research Facility as it was seen by Corporal Adrian Shephard of the H.E.C.U. Half-life: Opposing Force is still an amazing game, although it is not nearly as amazing as it was when it was released.
Alien flora artwork by Harry Willson
really subnautica esc. I'm assuming this is for the chapter crush depth.
oh, nice theme which continues to increase Xen's alien world from released Black Mesa Xen :)
Doesn't look like Xen if you ask me.
It does look like xen