Pierce fights alongside Oleg and the Boss in taking down STAG and the Luchadores around the city until The Protagonist gets called by Kia about blowing up the Steelport state. The Protagonist successful finds all 3 after being detected and escapes from the Thermopylae, destroying the ship in the process, although angering STAG and makes them instate martial law. Both are taken away to be processed by a soldier, and The Protagonist agrees to avoid detection, but angering Pierce in the process and earning him a butt from the soldier's rifle, sneering at The Protagonist as he was taken away. When Shaundi is captured by Kia, the Boss comes up with a plan and so Pierce and Viola are taken by the Boss disguised as Cyrus Temple to the Thermopylae as prisoners. He helps in defending the Saints HQ from STAG. He later helps to rescue prostitutes from the Morningstar boat by helicopter. Pierce was almost killed by a hooker assassin with his own gun, being saved by The Protagonist and the three repel the attack. Shaundi storms out and leaves Pierce, Zimos, and The Protagonist at the party. They went on to buy a Friendly Fire from the Morningstar through ownership deeds, an apartment building, and then cleared two Gang Operations, as well as picking up some sex dolls, Pierce decides they need to start taking over Steelport.
Pierce makes a brief appearance in the game's second DLC, in which he is talking to Eric Gryphon about getting the Saints protection, because Dex, now head of Ultor Security, wants him dead. Pierce joined the Saints along with Carlos and Shaundi. He and Shaundi help the Boss against The Brotherhood.
Go to a busy street like the main strip downtown and you should hit level 8 streaking- the longest you can streak at one time easily. You don’t need to do this, but it keeps the time going so you don’t have to keep restarting. The character will then have a certain amount of time to shock a number of people. When you are nekkid, head streetside and double tap down on the D-Pad to initiate the streaking run. To streak around Steelport, you need to hit a crib or store and remove all your clothing- although shoes and boots are allowed for streaking.