Vantaggi
The non-managers are really good and skilled. Some of the best engineers I have ever worked with, seriously. The lunches are good, the facilities (laptops, phones) are good and Office IT does a very good job. The hacking culture is good and there's a lot of freedom for experimenting new technologies.
Svantaggi
The offices are cramped with people (while other areas are semi-abandoned); there's a culture of fear and control (you MUST be in the office from 9 to 6 or 7, don't even talk about remote work or working from home). Promotions are non-existent, pay rises ridiculous. They'll happily keep you on a 6-months contracts because they never believe in people, then they act surprised if you leave the company. Salaries are below market average (about 3K for an entry engineering position); the evaluations are based on hearsay and the whole ship is sinking (but they don't care; Spil Games makes money even without people) but everyone's happily polishing the brass on the Titanic.