Not really a must, but really good to have. There is this place called ihub, basically is like typical computer lab where u can go n use the computer.
Through out the academic year u may need to do some admin work, and the deadline always falls on a time when u r busy, thus better to have a laptop with u.
Also, dont worry about addicted to gaming , eee is stressful enough, surf internet also feel guilty.
No need high end gaming, something reasonable can already.
Best to prepare enough pens n writing paper/exercise book ro practice all the questions, all is pen n paper, pen n paper still the best for engineering