Soulcalibur IV
50 Achievements
1,000
50-60h
Xbox 360
Gladiator
Won consecutive Ranked Matches (Online).
20
How to unlock the Gladiator achievement in Soulcalibur IV - Definitive Guide
Also note that you must win 2 IN A ROW! straight after another, i won a match online then went back to the menu then back to win another match online and it didnt unlock for me. As the solution above states best method is to just host and win, as it tends to be a bit glitchy.
Win 2 Ranked Matches in a row. Some claim that this is glitched, so just host the Ranked Matches and win 2 in a row.