A study was conducted to investigate the effects of free-range, part-time free range, and confinement rearing systems on performance of the four Aseel chicken varieties (Lakha, Mushki, Peshawari, and Sindhi) for 10-week duration (7-16 week). A total, 216 Aseel cockerels (6-wk-old), 54 from each of the variety, were allotted to 12 experimental groups, in a 3 × 4 (rearing system × Aseel variety) factorial arrangement under a randomized complete block design, replicated 3 times with 6 birds in each. Final body weight, weight gain, folds of increase, and mortality parameters of the growth performance and carcass, breast, thigh, drumstick, wing, liver, gizzard, and heart yields parameters of the slaughter traits were evaluated. Data were analyzed by using the 2-way ANOVA under factorial arrangement. The results indicated increased body weight gain, folds of increase, breast and drumstick in both confinement and part-time free range (p < 0.05), whereas enhanced body weight, dressing, thigh, liver, and gizzard only in confinement rearing system. Among the Aseel varieties, Sindhi showed enhanced final body weight, weight gain, thigh and drumstick yields, whereas breast and gizzard weights were found to be greater in Lakha and Sindhi varieties. Carcass yield, however, remained higher in all varieties except Peshawari. These results suggest that indoor rearing system has a positive effect on the growth and slaughter traits of Aseel chicken. Among the varieties, Sindhi showed better growth and slaughter performance in alternative rearing systems and hence, can be used as slower growing meat chicken in outdoor system of poultry production in developing countries for better livelihood.