Fett is seen with only one blaster in the games because he lost his other blaster while fighting Obi-Wan on Kamino, since he originally had two dual wield blasters.
When confronting Fett ingame, a clone will sometimes exclaim, "It's Jango, and he brought his head!" referencing how he was slain and beheaded by Mace Windu. They do not make any mention of him being their progenitor.
Jango Fett is shown in the singleplayer menu of Battlefront 2's PSP version.