The Green Lantern Corps #222 (March 1988), titled "The Last Testament of Sinestro!". This issue, written by Steve Englehart with art by Joe Staton and Mark Farmer, features the execution of the villain Sinestro by the Corps members.

The Green Lantern Corps #223 (April 1988), titled "The Last Testament of the Green Lantern Corps". This issue deals with the fallout from Sinestro's execution, as the Central Power Battery on Oa begins to decay and reclaim energy from the Green Lanterns' rings.

The Green Lantern Corps #224 (May 1988), titled "The Ultimate Testament!" and marketed as "The Final Chapter in the Saga of The Green Lantern Corps". This is the final issue of the series' first volume, written by Joey Cavalieri with art by Gil Kane and Mark Farmer.