Very decent job of upgrading the unfinished campaign to something that looks good. I enjoyed most of my playthrough on Single Player even though a lot of the campaign's unique features were designed with co-op in mind. There's a few spots with rough visuals that don't quite feel like something Valve would ship, but that's empty criticism considering this was not a professional effort - these spots are few and far between. There's also an equal amount of nice visual touches, I particularly liked the miniature of the Dam in the visitor's centre (though this area could have been better lit to show it off more). My only major criticism is that the whole experience was let-down by a sharp difficulty spike on the finale. Throwing a bunch of scripted Tanks and Hordes at the player while also scripting Special Infected spawns feels incredibly cheap and not something that would have been in an official version of this campaign at all, let alone doing so barely a few feet away from the survivors mere seconds after activating a panic event. The area inside the Dam is particularly offensive since it completely distracts from the task at hand, which was a unique concept and very well realised here with the rushing water effects. This will probably be less of an issue with a well co-ordinated team of four humans, who may enjoy the challenge, but to them I'd say Expert Mode is just a click away, and it still stands that forcibly scripting literally every zombie that can be spawned at once is not something an official Valve map would do, which this mod seeks to provide. As is to finish the campaign on Single Player I had to turn down the difficulty from Advanced to Normal or the AI would be wiped in seconds every time, which was kind of an anti-climax. That big black mark aside, the overall experience is a commendable effort and worth playing for sure.