- Steam Sales which are cheap,, but not as cheap as to call 'free'. But I will buy a game thats on sale for a few dollars (or .49 cents) just because maybe someone will want it someday.
- Humble Bundle is certainly the king of cheap games. And some of them are actually pretty good. They get part of the proceeds to go to charity so its a tax writeoff for the developers and a good deal for you. Often we can buy 5-6 games for $1.00 ... or 10 for $6.00
- Kinguin is a good site sometimes. Games aren't 'on sale', they are just sold cheaply as steam keys ... probably stolen steam keys but what the hell, its a good deal I have gotten a few things from there, no complaints.
- Bundle Stars packs about 6 or 8 games into a 'Bundle' and sells them for $2 or $3 dollars.
I just cant pass up a deal so I have several HUNDRED games, many of dubious quality, that I have purchased for little or nothing.