階級: class, rank, grade / 懐旧: recalling the old days, nostalgia, reminiscences

介入: intervention

改善: to improve

開発: development

開発: develop

快速: high-speed / 快足: nimble-footed, fast on one's feet / 会則: society or club's rules or constitution

解像度: resolution

怪物: monster

解像: resolution, as of a display screen or image / 改造: reorganization; revamping; remodeling / 晦蔵: a hidden talent; an undeveloped resource, a reserve

改造: to reorganize; to revamp; to remodel / 晦蔵: to hide one's talents