Remember Lemmings, the puzzle game that let you tunnel cute critters to safety? Ratmaster satisfies the same primal needs by giving you adorable rodents and several slider puzzles to steer them on. Move road pieces and obstacles to steer your rat past a gauntlet locks and keys, electric fences, and scary snakes who want to turn your rat into a snack. When your rat arrives safely at the wedge of cheese, it dances with joy. These puzzles start easy and get more complex and challenging as you go.

This demo version contains 12 puzzles to test your wits in a limited number of uses. The paid version gives you 72 puzzles and as many goes at them as you need. Both offer in-game hints and let you track your scores.

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PCWorld