Re: I miss System 7
Go on to eBay, buy yourself a Performa 475  and load up System 7.1.1 onto it. Go get Civilization from the Macintosh Garden, download it onto a zip-disk (remember those?) or burn the file onto a CD (likewise) and load it into the aforementioned Performa with a SCSI zip-drive or CD-reader.
You then have the glory of playing one the best games from the last century running on the might of a 68LC040 25MHz processor. Stay up all night playing, drinking coffee and eating pizza and then note that you aren't 22 any more.
If you don't mind emulation, there is also Basilisk and SheepShaver.
 Note, if you are unfortunate, you may need to get the capacitors replaced. The 20 year old PRAM battery will not work no more.