This map can be downloaded from the UGX Map Manager.
[ZCT] Chaos has made many popular maps, and 420 Labs is one of his earlier maps.
Setting: The map takes place in an abandoned laboratory, which I assume is an experimental marijuana development and cultivation center in Jamaica
Positives: The map is a good size - lots of areas to go to. No area feels wasted or useless. There are objectives which lead to a map ending and there are also a couple small easter eggs. This map was one of the earliest objective maps and therefore made its spot in history as such. The easter eggs are also fun to do, and I didn't even know about them until a couple months after the map came out.
Negatives: There is a machine on the map called The Gambler, and if you spend points on it you have a random chance of either getting something good or bad from it. I think this goes under-utilized and probably doesn't have enough reward to justify the risk. It's also not really necessary to use, similarly to the gun store in UGX Cabin. It's cool but it goes un-used.
Conclusion: Unlike most maps where I need to spend 75.000 points and donate my sperm and wait for a baby to be born from it via invitro fertilization only to sacrifice it to the map, this map has an objective set which is fun and not too ridiculous to bother with. It has easter eggs to keep you coming back and it has a low-commitment feel to it that keeps it in my mind as a map I will always want to play. The map was only of the earlier ones to feature ZCT mod, and it really compliments this map.
Level of Detail: 6/10
Custom Content: 7/10
Fun Scale: 10/10
Available on the UGX Map Manager.