Most co-ops are full time - some are part time (and they encourage you to then get a second part-time job - they call it 20/20 twenty hours each from two jobs). The transition is hard - be prepared to be extremely tired the first few weeks - waking up early, commuting, and then coming home late. However that goes away and the joy of not having homework on weekends takes its place. During their first co-ops my daughter and her friends really enjoyed and explored Boston - taking in the sites and the various eateries.
My daughter has a friend who is game/computer joint major and his co-op this semester is part-time research leading a game development team - he is loving it (has a game demo coming up in a few weeks and is very excited about it).
You can do 1,2, or 3 co-ops and graduate in 4 to 5 years. Depending upon your major (don’t know how it works with dig arts/game) you can have a lot of flexibility in determining when you co-op - you don’t have to have it all planned form the beginning.