SpeedRunGames has released Grappling
Hook(http://ghook.speedrungames.com/), an US$19.95, first-person
action puzzle/platform game, where you use a grappling hook to
overcome various challenging obstacles by performing incredible moves
and fast combinations of daring tricks.

The game features 22 dynamic, animated levels, 30 achievements and
176 challenges. Eight additional free levels will be released within
the next two weeks. A free, five-level demo is available for download.

The game is available for Mac OS X and Windows. A Linux version will
follow soon. The Mac version requires at least a 2GHz processor, 1GB
of RAM, and Nvidia GeForce 7600/ATI Radeon X700 graphics card.