I used it for an architectural visualization startup. I built the entire prototype myself, including a virtual tour guide that used the gameplay AI to find its

I used it for an architectural visualization startup. I built the entire prototype myself, including a virtual tour guide that used the gameplay AI to find its way around a building, and contracted out the content production to a few artists. Dungeon Defenders is the most recent "small" title I know of using UE3. Infinity Blade was produced by an Epic Games subsidiary, but they'd be an indie title otherwise. Most major cross-platform game titles are built on UE3, so it wouldn't be a technology reason that an indie game couldn't be successful using it.