A compact, discrete path Nd:YAG Innoslab laser amplifier system with novel eight-pass arrangement is developed. An electro-optic Q-switched oscillator using Nd∶YVO₄ crystal as gain medium is used as the seed laser. With a seed laser power of 2.7 W at a repetition rate of 2 kHz, the amplified laser power of more than 13 W is achieved successfully with the pulse width of 15.5 ns, and the corresponding extraction efficiency is 14.6%. The experimentally measured laser beam quality factors are less than 1.7 and 1.5 in the x and y directions, respectively. Self-lasing and amplified spontaneous emission (ASE) are not observed at the maximum pump power with discrete-path laser amplifier configuration.