Just finished playing Watch Dogs, beating the street date by almost 2 days. I'll be doing a more thorough playthrough (Realistic Difficulty, No Focus Mode) with the actual release on my stream channel when it unlocks on Uplay.
Ending spoilers ahoy:
Clara dies after a hit by Damien, after she tries to truly make amends for Lena's death. Damien takes over full control of ctOS, forcing Aiden to upload a virus made by T-Bone to disable it. Dedsec goes "Give us 30 seconds of full access, we'll become the Watch Dogs"(Paraphrased, nice Title Drop btw), and Aiden gives them the proverbial middle finger. Aiden kills Damien after confronting him at a lighthouse, where Jordi "betrays" you. Final scene of the game is deciding if you kill Maurice or just walk away.