Game you have taken time off from work/school once it came out.

[AlkamistStar]

The Legend of Zelda: Ocarina of Time

Hands down, the most played game for me. Nothing got in the way of my mulitple playthroughs, i remember spending 3 months at a friends house for the summer so i could play, since his mom (single parent home) wouldn't bother me while i was playing like my parents would.