"Single01" is a collection of different locations from suburbs to caves. The level is very n00bish with very little details, poor architecture and no lightning (a good example of this is the last cave area which is brighter than my living room in the middle of a summer day). The level is practically a one-way pipe, excluding the first arena/camp/swamp junction. There are neither buttons nor keys. Combat is easy (you're given all weapons with full ammo at the beginning) and repetitive.
A rushed level although some effort has been put into some of its areas such as the suburbs and the camp. Okay combat but offers no challenge.