Version 1.0 of A Valley Without Wind is now available, representing the retail release of this procedurally generated side-scrolling action game. The launch trailer shows the game off, and the A Valley Without Wind offers trial versions for either Windows or OS X, which can be unlocked to the full version. Here's a bit on the game:

A 2D sidescroller without a linear path. An action game with tactical combat and strategic planning. An adventure game that lets you free-roam a vast, procedurally-generated world. A Valley Without Wind defies genre stereotypes. Unlike other procedurally-generated games, you also get a logical progression in difficulty, plus helpful tips and checklists to guide your travels (should you need them).

Choose for yourself how to prepare to face the vastly stronger Overlord. Complete a variety of missions to earn arcane rewards, or roam the wilds to uncover secret missions and stashes of magical loot. Customize your characters with unique combinations of enchants and spells that change how you move, jump, and fight. Or rescue people and bring them back to your settlement, recruiting them to help you in return.

You choose how to play, and the world adapts around you.