It's half of your question, but a good basic electronic logic simulator is http://www.cburch.com/logisim/ http://www.cburch.com/logisim/ A digital electronics

It's half of your question, but a good basic electronic logic simulator is http://www.cburch.com/logisim/ http://www.cburch.com/logisim/ A digital electronics book could be paired with it for exercises. Or heck build your own microcontroller or something. A similar method is to instead of using a game to simulate circuits in software, use an FPGA to simulate a circuit in hardware. A cool book I've used to here, http://www.amazon.com/FPGA-Prototyping-VHDL-Examples-Spartan-3/dp/0470185317/ref=sr_1_4?ie=UTF8&qid=1420209829&sr=8-4&keywords=fpga http://www.amazon.com/FPGA-Prototyping-VHDL-Examples-Spartan... It will take you step by step from creating simple shift registers to displaying an image over VGA (which you implement yourself).