After Irish gets you to Mexico, the safehouse is given to you. The shack operates just like any other safehouse, with the options to change outfits and sleep/save, however it does not give the option to replenish ammunition, with the chest providing money instead. It is a necessary component to achieve 100% Completion.
- The shack appears in the Outlaws to the End mission, "The River".
- Irish may have used this shack as a safehouse from his mention of people disliking him within the towns, due to his cheating in gambling games and his promiscuity with women.
- It is unused in Undead Nightmare.
Acquiring the Irish's Shack contributes toward the following achievement/trophy:
Attain 100% List in the singleplayer game completion list.