Crystal mission v1.51 file

Hi everybody ! I'm neophus a fan since the beginning of Half-life and I created a new campaign to play and enjoy with friends for the most famous coop MOD on goldsrc which is Sven Co-op. It includes 4 maps with custom textures and models. It includes secret areas and easter eggs too so look closely ! I recommend to play with campaign with 3/5 players to enjoy better the experience. This campaign is the first version because I'm going to create 2 new maps in a second version. I hope you will enjoy this campaign as I enjoyed to created it ! Special thanks to many members from the Sven Co-op discord : Pyroxyde, Loulimi, Joce, Trempler, I_ka, Hezus, Outerbeast, H² and especially Sparks who helped me a lot !