Forgot to mention the "pirating is ruining the videogame industry" argument.
The reality is - videogame industry is ruining the videogame industry. Why?
In the search of ungodly amount of profits, large publishers often don't want to invest into high quality projects that are geared to the niche markets because those games aren't going to amount them large profit. This situation not only fills the market with lower quality(but mainstream orientated) games, but sometimes even closes entire gamers and critic-acclaimed developers.
Best example - Okami/Clover.
Okami, regarding to critics, is probably among the top 5% of all the console games to date. I'm playing it myself, got 40 hrs into the game, and IMHO it's the best console game i've ever played. The game is a masterpiece in it's field, and their makers, Clover studios, should be proud - wherever they currently work. Despite the obvious high quality of the game, Clover was shut down by Capcom. While i'm sure that Okami generated profit, it wasn't high enough to warrant Clover to live happily ever after producing high-quality titles.
IMO, the publisher greed for high profit is changing the gaming industry for worse. Developers are forced to make/make adjustments to games for general appeal of the market, so they can get bigger sales and survive the grim reaper of capitalism - innsufficent profit.
To illustrate this a bit further, we have the case of Sega becoming the savior of the Wii hardcore gamers. By publishing the Conduit and Madworld, they gained rep amongst the HC crowd, because both games are made by (small) devs which obviously love games and wanted to produce games which they theirselves would want to play, without big compromises.
Sega's rise in the eyes of the gamers just points out the situation on the market - while the move that sega made should be a rule, it has become a rarity.
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