Restore HL2DM coop spawn loadout

gamemode/shared.lua

@@ -86,11 +86,36 @@ function GM:IsSpawnpointSuitable(ply, spawnpointent, bMakeSuitable)
     return true
 end
 
-function GM:PlayerLoadout(ply)
-    if (not striponspawn) then
-        ply:Give("weapon_fists")
-    end
-end
+local hl2dmLoadout
+if SERVER then
+    hl2dmLoadout = CreateConVar(
+        "gc_hl2dmloadout",
+        "1",
+        FCVAR_ARCHIVE,
+        "Give the standard HL2 Deathmatch spawn weapons expected by legacy coop maps"
+    )
+end
+
+function GM:PlayerLoadout(ply)
+    if striponspawn then return end
+
+    ply:Give("weapon_fists")
+    if not hl2dmLoadout or not hl2dmLoadout:GetBool() then return end
+
+    -- Legacy HL2DM coop maps commonly place ammo for these weapons but rely on
+    -- CHL2MP_Player::GiveDefaultItems to supply the weapons themselves.
+    ply:Give("weapon_crowbar")
+    ply:Give("weapon_pistol")
+    ply:Give("weapon_smg1")
+    ply:Give("weapon_frag")
+    ply:Give("weapon_physcannon")
+
+    ply:GiveAmmo(255, "Pistol", true)
+    ply:GiveAmmo(45, "SMG1", true)
+    ply:GiveAmmo(1, "Grenade", true)
+    ply:GiveAmmo(6, "Buckshot", true)
+    ply:GiveAmmo(6, "357", true)
+end
 
 hook.Add( "SpawnMenuOpen", "DisallowSpawnMenu", function ()
     return LocalPlayer():IsAdmin()