So my dad's laid up with a bad back, stuck at home. I got him a 360 a few months ago and this is his first console (with the exception of watching my gaming for the past 20 year. So far he's maxed Skyrim, portal, mass effect 2 and 3. Not bad for a guy in his 50's.
I need to come up with some suggestions for new games. Nothing too frantic or aggressive... was thinking something along the lines of Tomb Raider or Prince of Persia perhaps.
I got my own dad The Saboteur. It turned out to be a bit much for him even on the easiest setting, but sounds like your dad would be fine. Minecraft, if you think that might be his type of thing. Rise of the Argonauts is underrated and easy, and the first Borderlands is a ton of fun and not too tough.