Thanks to a dedicated community, the PC version of Grand Theft Auto IV has been continually polished and upgraded since its release all those years ago. To the point where, now, it looks like something from the future.
The iCEnhancer series of mods, which we've featured before, are being updated to 2.5 (this is an alpha preview), and the results are amazing.
This looks as good as a quality first-person shooter. The fact that this kind of fidelity can be applied to an open world game the size of Liberty City is just mind-boggling.