Forget Counterstrike and its population of 12-year-old aimbot snipers blowing you head off milliseconds after rounding a corner: Natural Selection is my favorite Half-Life mod. Space marines claustrophobically battle insect-like aliens in the dark bowels of dilapidated spaceships and oozing alien hives. Being a combination FPS/RTS, it all tends to fall apart without a good commander, making good games outside of a league play a roll of the dice. Still, if there's any mod I've been looking forward to seeing updated for Source, it's Natural Selection.

Unfortunately, the developer of the mod is having a hard time making ends meet, so he's put together a quick Sudoku clone that he's selling for $12.95. Called The Zen of Sudoku, all proceeds raised will go directly to funding Natural Selection: Source.

An interesting strategy: a Sudoko game must be relatively basic to code, but with the entire world Sudoko-mad right now, it's probably bound to be a decent seller. If you're looking for a cheap Sudoku game for the PC, why not go on over to the Unknown Worlds site and help fund Florian Eckhardt's upside-down skulking in he Source Engine? Florian Eckhardt

Natural Selection and The Zen of Sudoku [Unknown Worlds]

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