The entire Anomaly series is on sale right now on the App Store, meaning you can pick up some brilliant tower offence games for a lot less than you could have done last week.

All of the games are about leading convoys of tanks, walkers, and other weapon-heavy vehicles through alien-infested territory. You plan the route, upgrade your units, and choose the order they roll out in.

The original, Platinum Award-winning Anomaly Warzone Earth will set you back 69p / 99c [buy] for the SD version, and £1.49 / $1.99 [buy] for the HD version.

At review we called it "one of the most entertaining and enthralling real-time strategy games on iOS."

Gold Award-winning sort-of-sequel Anomaly Korea will set you back 69p / 99c [buy] as well. We called it "big, brash, and beautiful," and "well worth a download" when we reviewed it.

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Last but not least you can grab Anomaly 2, the Silver Award-winning most recent addition to the franchise for just £1.49 / $1.99 [buy].

This one adds multiplayer to proceedings, and lets you transform your units to utilise their different attributes.

We described it as "a gorgeous, massive tower offence game," adding that "Anomaly 2 is good fun, but it's more of the same."

All in that's less than a fiver for three great looking strategy games that do things a little different. Sounds like a pretty good deal to us.