This discussion contains major spoilers of the plot of the single player campaign of Portal 2.
The original Portal is in part a performance of (and, thus, a consideration of) the mechanisms of power. The relationship between the protagonist, Chell, and the supercomputer, GLaDOS, reflects also the relationship between players and rule systems in games in general. Playing the role of lab rat within the boundaries of computer-defined rule sets is the heart of playing a video game and speaks directly to the complexity of negotiating between the freedom of play and the imposition of regulation necessary to “game,” given especially that embedded in gameplay is a negotiation that is a constant movement between giving up control to authority and then resisting voices of authority.
Thus, given that such similarities exist between the structure and narrative of the sequel and the original title, it is unsurprising that once again another Portal raises the issue of why we submit to rule systems, accept their challenges, and follow their orders in order to enjoy ourselves. In the sequel, though, I drew a rather hasty conclusion early on in my playthrough that, perhaps, this iteration of the series was going to critique politics and power in a more specific way than the more philosophical and abstract approach that the previous game had taken when merely acknowledging this theme through its gameplay.