Code Geass: Hangyaku no Lelouch R2, Steins;Gate Recommendations
Both are very exciting anime, with lots of plot-twists, well-made and rich stories, great voice acting and lots of thrills.
In Steins;Gate you get to see time-travel and all its effects on the human mind and its possibilities.
While in Code Geass you see the ambition of a young man who gets the power to command anyone to do anything and manages to create an uprising against an empire (Britannia).
Although Code Geass picks up immediately and it's engaging from the start, Steins; Gate manages to chill the viewer as you advance to the ending. Some are relatively unaffected by the plot behind Steins Gate due to the resentment caused by some of the "theories", which are held to be true in the anime + they also abhor simplicity of the plot for those who are connoisseurs in the effects of altering not only the past but the future. Nevertheless, I would think that many would enjoy how intricate the plot is - relative to most anime. I especially enjoyed steins; gate
Both mess with your mind and have amazing plot twists. Definitely recommend both.