Disclosure: these comments are based on a read through of the rules immediately after purchase - I have not (yet) played any of these games.

First thing's first, you're getting eight board games for $3. Where I work (the City of London) that isn't even going to buy you a sandwich. This is a phenomenally good value package. Each game consists of (roughly) one page of rules and a sheet to be printed out for each player. There is no real limit on the number of players but I would imagine that two players would make for a dull game and more than six or eight might make a time consuming game, at least for the ones where the rules require each player to complete all possible actions before play passes to the next.

The games are largely abstract and there is no movement element. The theme is competitive resource allocation and building, with options to attack any of the other players. In fact, it plays somewhat like a cardless card game. Each game tries to play to its theme (the sci-fi games have power cells, the fantasy games have archers, etc). The mechanic is die rolling using d10s. You roll a number of d10 equal to your population and can then use those dice to manage your economy. It doesn't really matter whether you roll high or low as each action requires different dice for different reasons, e.g. use two dice with the same value to build resource type 'A', use any even die to acquire technology 'B', and so on. The skill lies in using the dice you have effectively (like backgammon).

As far as I can see, the only downside is a common theme of inconsistency between rules and player sheets. It really needed a read through by an independent person. For example, the rules may say "to get building type 'A' spend an even die and three ores'" but the player sheet will say "to get building type 'A' spend an even die and three crystals". Which is correct? Who knows? Some errors are obvious to resolve, for others there's no way to tell.

All in all an interesting package with a clever mechanic at a bargain price, but it is crying out for a proof read and with each game having only one page of rules there is no excuse for that really.