You've still got a couple of days to catch the Radius Festival today and tomorrow and I thoroughly recommend it. Loads of interesting indie games to play, devs to meet and generally great fun all round. I couldn't see everything (and sorry if I missed you) but here's the stuff I did see and really enjoyed.
The best kind of horror game doesn't need any guns. It doesn't need to scare you with difficult enemy encounters and shock value. Sometimes, silence is scarier than all of that. That's a lot of what Alien: Isolation is about
Modder TheWorse has created a mod for Watch Dogs on PC that brings it closer to the original E3 demo, following talk of a visual downgrade. This tweaks a range of values for cameras, lighting, reflections, LoD and more.