(cycling, motor racing, video games) a time trial; a race against the clock / (video games, by extension) a speedrun, including tool-assisted speedruns

(video games) to speedrun

(video games) real-time attack

Abbreviation of リアルタイムアタック (riaru-taimu attakku).

long-distance cycling as recreation

renewal; update

to renew; to update

(music) attack

to attempt to climb / to profess of one's love

to challenge / (figuratively) to take on the challenge of doing something (especially something one has not done before); to try; to try one's hand at