#1: FFVI - prior to final fight w/ Kefa. Grinding Levels/Stat bonuses with appropriate Espers in the Forest with Dinosaurs. (9999 dmg ICE/FIRE/BOLT 2's on Relm)

#2: Space Rangers 2 - Any time once you can kill a Dominator. Finding Dominators or Pirates to kill for thier spare parts.

#3: MechWarrior IV - Farming uber weapons on exceptionally replayable lower levels. (Salvage all M****F****!)

#4: FFXIV - Initial quest to get a relic weapon, and it's first upgrade. (everything after has been pretty much crap)