Sirlion packed a lot of range into this entry, even if it shifts themes fairly abruptly. It takes you through industrial, lab, cargo tunnel and finally topside environments. It's a little rough in places, feeling a little more like the Half-Life beta to me than the final game, but that's fine too! The large depot section at the end is easily it's most interesting part, even if the HECU AI couldn't quite comprehend our crossbow bolts picking off their friends. There's also a secret Tekken arcade room, which doesn't seem very Black Mesa-ish to me, but hey, maybe Kleiner's a fan?