Here is the full list of all 7 Minimum achievements.
Eliminate 100 players in Titan Mode.
Farm 50 creeps in a single match.
Destroy 10 enemy base turrets in a single match.
Deal the final blow to an enemy Titan.
Kill 50 Raptors in a single horde mode match.
Deal the final blow to 11 enemy Titans.
Destroy 15 deployable enemy turrets in a single match.