There is a certain poetry to even the worst videogame. A game like Rogue Warrior or Bad Rats is still entertaining in the same way that watching an automobile accident is entertaining, it's a "my goodness, just look at this" sort of spectacle. It draws you in, compels you to watch, and in doing so it keeps you entertained. There is value, however little, in that. After all, what is a game's purpose if not to entertain?
There is another type of game, however, one that doesn't sink so low as to become "so bad it's good", nor does it rise high enough to become decent, or even mediocre. It commits the worst kind of media sin: It is boring. Revelations 2012 isn't terrible in the way that Big Rigs: Over the Road Racing is terrible. Revelations has interesting environments (the jungle setting is fairly well detailed and is a nice change of pace from most shooters), the weapons are ok (the shotgun analog weapon is particularly fun to shoot, especially when you get the powerup that increases your rate of fire), and being a Source Engine game it runs fairly well even when it throws a huge amount of enemies onto your screen. The problem is that Revelations 2012 is boring.
I recently played a three player co-op game of Revelations 2012. Even after we were able to jump over the technical hurdles required to get the game running, there was that initial "hey, we're in co-op, talking to each other while we're shooting at enemies, cool" excited feeling, but that very quickly settled into thoughts of "why are we doing this?". We just sort of lost our drive to continue.
I have around 70GB of video recorded of the game session, and I am really having a very difficult time coming up with the motivation required to edit it. Much of the footage is the three of us just running around shooting at enemies. There wasn't a lot to talk about once you mentioned the basics, because you can mention everything of interest in Revelations 2012 in about 15 seconds.
If playing Bad Rats is the equivalent of watching Troll 2, than Revelations 2012 is the equivalent of watching four hours of uneventful city hall budget meetings on public access.