Players expect challenging quests to offer valuable and exciting rewards.
In Skyrim, the 'No Stone Unturned' quest offers a lengthy and frustrating treasure hunt, only to provide a passive ability that slightly increases gem finding.
In Pokémon games, the reward for completing the Pokédex, a monumental task, is a simple diploma.
In Dark Souls, defeating the tough boss Calamity rewards players with the Calamity Ring, which doubles damage received.
Shadow of the Colossus features a secret garden that requires multiple playthroughs to reach, with the reward being fruit that permanently reduces health and stamina.