Flip You. Flip You For Real Achievement
Flip You. Flip You For Real20
Kill 50 enemies total using the Melee Attack.
Run up close to an enemy and press to do a melee attack. Kill 50 for this achievement. In the later stages, enemies with red health bars will not die from one melee attack so be careful. Enemies with blue life bars will still be taken out with one attack. It's hard but possible (unadvisable) to do them on heavy armored guards from behind but there's no point.