DO? - Half-Life

The readme is in French so I guess this guy is French.
Short mod but…
Textures and lighting are way above average for this oldish mod, and are worth looking at.
The gameplay is slightly odd, with the physical obstacles being unusual but well designed.
No real ending as the player is sent round in circles.
Worth a look.

Is this really a mod or a map pack? I had to put the maps in valve/maps folder and got the hev suit in the first map, but couldn’t find a way to get to the second map, I just ended up in a room I’ve already been and figured that was the end and had to load do2 manually.. If I missed something, I blame it on the lighting;)) But playing the second map with no hev is just no fun as you can’t switch between weapons, I ran out of ammo and had no flashlight so I stopped. But I liked the mapping, it’s pretty damn good, you might say unique. There was one badly built staircase, but other than that, all I can say is that this guy is creative. Enemy placement isn’t always great. But he managed to create a certain atmosphere. I wonder why he didn’t have any story in mind in the first place, it’s a pity.
So.. can any of you guys tell me how you got to the second map?

Well I followed the hallway and ended up next to disappearing GMan, but the first time I got there I went down after him. Now that was a dead end.. so I never gave it a second thought! Matter of fact the door was at the same level, I just had to wait for GMan to go down and the trap to close so I can stand on a platform. Sheesh! Thanks for the hint.
Pretty puzzling and interesting for such an old mod, lots of doors and halls that are noticeable just for a few seconds.