There are 7 types of chicken rice set in the main menu and yes, 13 Stages serves only chicken legs; there is no breast meat option.
We ordered the Samsui, Sesame and Assam Chicken Rice ($8.90 each) and snacks of chwee kueh (4pcs at $2.90) Samsui Chee Cheong Fun with chicken bits ($4.90), the not a bitsa crispy duck wrap ($6.50), a delightful serving of chicken floss wrap($4.90), with a side dish of imperial salad ($5.50). The prices are inclusive of GST and there is no service charge.
The Chicken sets are all served in bamboo baskets and came with a plate of chicken rice and a bowl of soup. Basically they are all steamed chicken top with different sauces, garnishing and gravy. I like the assam more, which came with vegetables and a generous amount of tangy assam gravy. The chicken is very tender and juicy. The assam gravy is slightly sweet and not spicy.