Spyro and Crash trilogies on the PSX, as well as the Quake 2 port, would definitely merit being called technical masterpieces

On the original Xbox, Phantom Dust would fit that bill, despite being a commercial failure at the time. The tldr is that you create a collection of spells (attacks, traps, dodges, curses, buffs) and try to grab them and the “mana” during the real time duels, in order to beat your opponents. Terrain is semi destructible and you have to take into consideration the trajectory of your spells - www.xbox.com/games/store/…/9PCDNBHR11MR