Nemesis of the Roman Empire is more of a mini-sequel than it is a full-blown second installment to the critically acclaimed Celtic Kings. You get two new factions, the Carthaginians and the Iberians, more unit upgrades, and a few gameplay enhancements. However, it's priced right at $29.99, and most importantly, it's a blast to play.

Nemesis is a blend of real-time strategy and role-playing, with a dash of wargaming tossed in for good measure. It's unique in its design that there is no base building whatsoever. The only thing you ever spend money on is the buying and upgrading of units. There are no peasants in the game at all, so you don't need to worry about how many idle workers you have sitting around. Everything is centered on your army.