Truco Arbiser is the first ever implementation of the card game Truco developed by Ariel and Enrique Arbiser for DOS. A more elaborate variant of the Spanish card game Truc, the goal is to reach 30 points through bluffing, but also skill and luck, and is typically played with a 40-card Spanish deck. This particular version notably has a challenging AI opponent, capable of bluffing, sustaining brief conversations and making smart decisions.

Normally, a game of Truco takes about 12 minutes; however, eien86 pre-buffers the inputs and wins against the opponent before the game even launches and thus finishes the game in one round, as the game takes the pre-existing input from the keyboard buffer.