Video from https://www.youtube.com/c/AymericTheNightmarexChilderic_Bantu

CS:GO, of course, because it's the game you'll play.

Half-Life Source, because you'll need to decompile the files.

GFCScape, to extract the Half-Life Source files.

BSPSource, to decompile the Xen maps.

CS:GO SDK, to edit the Xen maps.

A lot of patience! ;)

With BspSrc, open "hl1_pak_dir.vpk" in your Half-Life Source folder.

(\steamapps\common\Half-Life 2\hl1)























Extract "Maps", "Materials", "Models", "Resource", "Scripts" and "Sound".

It's easier for you if you extract them on your desktop.
























Put those folders in your CS:GO folder.

(\steamapps\common\Counter-Strike Global Offensive\csgo)

There's an issue with all Xen maps (from c4a1 to c5a1).
I will show you how to fix that problem.























You have to decompile the maps with BspSrc.























You'll have a ".vmf" map.























Open the CS:GO SDK, then Hammer.























Open your ".vmf" map.























Click on "VisGroups", then "Auto".























Uncheck "Nodraw" and "Water".























Press F9. Check "Don't run the game after compiling". Click on OK.























Just wait a little. Hammer is compiling the map.























It's done. Put the map in the CS:GO "maps" folder.

You will need all these Commands to play Half-Life Source maps in CS:GO.

sv_cheats 1
This is the master command.

ent_create info_player_counterterrorist
You have to enter this command twice before spawning as a CT.

ent_create info_player_terrorist
You have to enter the previous command then this one to spawn as a T.

mp_warmup_end
If you don't want to wait the warm up time, enter this command.

mp_roundtime 99999
This command gives you infinite time.

mp_ignore_round_win_conditions 1
You don't have to win or lose after all.

mp_restartgame 1
If you die or if you have an issue, this command restarts the map.

god
You're invulnerable with this command.

noclip
Now you can fly and go through walls.

ent_remove
With this command, you can delete what you're aiming at.

I recommend you to bind some codes to use them easily.

Steam Guide of my CS:GO Binds:
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=1087906844

More commands:
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=1995743598

- In General:

It's impossible to climb ladders.

Most of the scripted events don't work.

I can't push or pull the crates.

It's possible to go through certain vents only.

I removed the water on all Xen maps (from c4a1 to c5a1), with Hammer, because there's a shader issue with it.

- Specific to certain maps:

c1a2 : AWP | Electric Hive on left side. I hit a wrong key : "c" (incrementvar cl_righthand 0 1 1) instead of "x" (ent_remove).

c2a3e : Before the Five-SeveN | Hot Shot. There is no cutscene of course, but I spawn in this zone. I never found this piece of map. That's why I was spectating.

c2a5b : CZ75-Auto | Tigris. Since the CZ-75A has few ammo, I used the code "sv_infinite_ammo 1" to have unlimited ammo.

c2a5e : AK-47 | Red Laminate. There are some bullet holes, before the Osprey attack. They aren't mine. I don't know what happened.

c2a5g : SCAR-20 | Cyrex. I had an issue with this map, so I launch a Workshop map in Competitive mode, then I re-launched c2a5g. That's why there's "équipe antiterroriste" written here.

c3a2d : P250 | Muertos. When I jump into the portal, there's a dead CT. In fact, it's the spawn point. I died here because of the "trigger_hurt".

c4a1b : M249 | Nebula Crusader. The map is darker than its HL:S counterpart. I'm not a mapper, but it's probably a Hammer issue. It looks nice though.

c5a1 : Mag-7 | Memento. The music was too long for the video, that's why I recorded the main menu (January 12, 2018) to listen the full music.