I think the most undeservingly disregarded weapon of all games is the disc primit.
In TRON 2.0 it gave you a guided projectile with considerable damage (if you had the megahurtz and the primit charge subroutine), a zoom function (with triangulation) and absolutely no ammo use, which was able to kill pretty much any enemy if you got a headshot in. It also doubled as a shield against other discs, which would then turn into a projectile for your cause as well, being deflected at high speed towards the enemy, breaking shields and completely shattering the attacker.
Also, with cluster and sequencer routines, it was the most versatile weapon, useable as a quick-firing assault weapon and an explosive projectile.
I like the disc
