Such as these:
You can place a gorge tunnel in any vent that is wider than normal, such as the server-platform vent. On some maps you can also put them in places where the vent turns and there is more space, such as the extraction-smelting vent. Like the cargo example, you can also place them in high up places that are hard for marines to see, let alone attack. Many of these locations are not accessible to marines until they get jetpacks, yet gorge tunnels are a 1 hive upgrade.
This is most definitely definitely asymmetrical, but I would hardly consider it balanced for the alien team to be able to place secret tunnels which are inaccessible to marines until a prototype lab is built. Perhaps disallow gorge tunnels in vents and root out problem areas like the one in cargo. Or, in the most extreme case, limit gorge tunnels to places where there is infestation.
http://cloud-2.steampowered.com/ugc/630782139749182983/6D52E76D219461B5CF3AB83FB9074D300498C585/1024x768.resizedimage
http://cloud.steampowered.com/ugc/630782139749184613/EA4B498750DCAEFD40168B6F2F5BE060F953AD0B/
http://cloud-2.steampowered.com/ugc/630782139749180815/A422EC0CA67E812AFF3E14C402D109647709DABE/ (marine view)
You can place a gorge tunnel in any vent that is wider than normal, such as the server-platform vent. On some maps you can also put them in places where the vent turns and there is more space, such as the extraction-smelting vent. Like the cargo example, you can also place them in high up places that are hard for marines to see, let alone attack. Many of these locations are not accessible to marines until they get jetpacks, yet gorge tunnels are a 1 hive upgrade.
This is most definitely definitely asymmetrical, but I would hardly consider it balanced for the alien team to be able to place secret tunnels which are inaccessible to marines until a prototype lab is built. Perhaps disallow gorge tunnels in vents and root out problem areas like the one in cargo. Or, in the most extreme case, limit gorge tunnels to places where there is infestation.