Before I start reviewing the game let me tell you; if you can't stand really grueling, unreliable and awkward tasks then you should probably not buy this game. VCD is all about doing chores you would normally hate and can be really punishing if you aren't careful or wise on your decisions.
With that said, this game will be a fun and challenging experience for those who like hygiene. You have multiple and versatile tasks such as cleaning blood and soot stains, repairing bullet holes and picking up shell cases, restocking medkits, taking out the trash, stacking objects, filling incident reports, etc. The last two are optional but will award you as the Employee of the Month as long as you did the previous tasks adequately.
To ensure the game isn't repetitive and boring some of the maps come with unique tasks and gimmicks. For example: 'Hydroponic Hell' requires you to dispose of weeds and replant the pots with the desired flora, 'Unearthly Excavation' comes with Sarlacc pits that you need to bury and can be feed with viscera if you want to, 'Zero-G Therapy' and 'Gravity Drive' have airlocks and the ability to turn gravity off.
If you like reading then every map comes with notes and datalogs of the deceased workers, they inform you on what the company was working that could lead to such a bloody end. The player also has some form of backstory: You are the replacement of a previous janitor that went psychotic, Bob. He has been on most of the facilities you clean and you can find notes of his misadventures to keep you motivated.
Like stupid and wild physics? Well if you push this game's engine you can go flying anywhere like if you were playing Garry's Mod. This will get better if you play on multiplayer where you can skyrocket with your partner!
All this sure sounds painful but don't worry, the experience of being a janitor is quite relaxing and you will train your patience. With every device randomly deciding to malfunction by dispensing viscera or getting jammed, your clumsiness leading to spilled buckets or broken lanterns that start a fire and finally you end up going insane just like Bob... the life of a janitor sure is beautiful.
But really, if you are still unsure that you can stand all this punishment then get yourself a friend to play with. As always: The more the merrier and the more chances you will make a bigger mess.
So what about replay value? Normally every official map will leave you with something like 28 hours tops but there are players that have more than 100 hours on record including me. You have speedrun mode where your objective is to clean the level on a par time, a level editor and workshop support. And you also get a free copy of the two side projects/spin-offs: VCD: Shadow Warrior and VCD: Santa's Rampage.
Are you afraid because you have OCD? Don't worry, players have claimed that it makes the experience better and I myself can confirm that's true, because I used to have OCD when I was a child.
Overall the game has a great concept and right execution, with good developers in touch with their community and this one being helpful with reporting bugs and helping each other.
So grab your mop and get to work because that floor is not going to clean itself. And don't you even think of leaving the door of the incinerator open again when you clock off BECAUSE YOU WILL BE FIRED.