You can sneak past approximately 90% of enemies by utilizing cloak and cover . Always move between cover points to allow your energy to recharge before it hits zero. Combat & Weaponry Tactical Visor (
Focus on re-routing the power in the "Eye of the Storm" mission without being detected . Crysis.2(GamingBeasts.com)
Practice killing enemies while sliding; it is often easier to achieve this against CELL soldiers than Ceph units because their animations are faster . You can sneak past approximately 90% of enemies