If I was nerdy enough to have a "favorite engine," it would probably be the Unreal Engine - not necessarily for its technical achievements (though you can't say it hasn't been pivotal in game development's innovation the past decade), but for its accessibility. The easy-breezy development kit has been especially kind to indies, and because of that, some brilliantly creative games have been built on the engine. Now Steam's flogging an Unreal Indie Bundle, and for $20, it's actually got a pretty admirable selection of games.
The first half of the Indie Royale Evolved Bundle's name sounds like a gourmet, locally-grown hamburger. Look elsewhere if you're hungry for food, but if you're hungry for five DRM-free indie games, the bundle is selling at a fluctuating minimum that's currently sitting at $5.35.
The year is 20XX. Over-reliance on mysterious "cloud storage" and catastrophic "Y2X" software failures have devastated the world's supply of PC games. You can only choose five games to preserve. What's at stake? Oh, just the fate of PC gaming and ten dollars. Yep, that's (mostly) right: drop by GOG this week and you can liberate five DRM-free games from their servers for only $10 (around £6).