Half-Life: Decay - Rift

Cross and Green are forced to defend the displacement beacon against a variety of attacking Xen creatures, including a Manta Ray.
SPOILER ALERT: This video may spoil you. Please buy and play the game, be patient and ONLY IF you don't succeed the current level watch this video.
decay.half-life... - to play!

[@1Juanse1]

I'm playing the original game on PS2, this level is practically impossible.

[@BlackSailPass_GuitarCovers]

Screw this level.