Overpowered abilities, attacks, moves, perks, etc. that have made a game too easy

[SvennoJ]

XP makes games too easy. All games with level up mechanics suffer from an inverted difficulty curve. Overwhelming in the beginning, boring at the end. Nowadays games just throw more and more enemies at you to slow you down, which only gives you more xp, vicious cycle. The alternative solution is worse, hard level requirements that require grinding. XP ruins games!