Unique Physiology: Due to a military enhancement procedure, Slade Wilson's physiology was changed permanently. First, the procedure crippled his mind and body. Then, the experiment rebuilt his physical and mental faculties further than a human could process or build. These enhancements make Deathstroke an enhanced human, not superhuman and afford him the enhancements.
Enhanced Intellect: Able to think 9 times faster and utilize that much more of his mind than your average human for information processing and sorting, Deathstroke's mind is virtually a computer built for strategy and problem-solving, one that works at optimal ability even when under stress and fatigue. He is also ingenious in devising solutions against superior aspects of opponents, can observe and exploit, and can calculate distance, speed, and time at lightning speeds; his sense of timing is superb, bordering on perfection.
Enhanced Reflexes: Deathstroke possesses enhanced reflexes. The speed at which he reacts allows him to dodge fast-moving projectiles such as arrows and bullets. He can usually out-react even the fastest humans, no matter how well-trained.
Enhanced Speed: Ability to run at speeds of up to 30 mph and long distances far out-performing any Olympic athlete.
Enhanced Stamina: Deathstroke can exert himself at peak capacity greater then any human could.
Enhanced Strength: His entire muscular system was hardened and strengthened making Deathstroke many times stronger than an average human to the point of tearing off an airplane door and twisting steel with his bare hands.
Enhanced Senses: Deathstroke's senses have been augmented to higher levels of ability. He can perceive things better than a normal human. This includes, but is not limited to: Hearing, Smell and Vision.
Regenerative Healing Factor: With an enhanced ability to heal damaged tissue, the rate at which Deathstroke's body recovers from injury and capable of being repaired before death. As such, Deathstroke's body can take a tremendous amount of punishment before succumbing to death. Simple gunshot and stab wounds, cuts, and broken bones can heal faster than normal. He was once impaled clean through his chest, and it did nothing but slow him down and cause great pain.
Enhanced Immunity: Deathstroke's regenerative abilities have some affect on his body's ability to process through harmful, foreign substances and he has become naturally immune to deadly poisons and illnesses.
Retarded Aging: An important aspect to note is that while Deathstroke is apparently aging, he does so very slowly, appearing younger or older than he actually is.
Tactical Analysis: Slade is a great strategist and tactician. Always calculating his opponents moves before hand; he even single handedly defeated the JLA roster that lacked the "Big Three". He has been compared to Batman in terms of tactical methods. Even against metahumans he has proven more than a match for them all at once with time to prepare. Roy Harper once claimed the Slade was, "The worlds greatest tactician." Using his superior problem-solving skills, Deathstroke can work out a battle ahead of time for many possibilities and predict enemy movements and tactics after the battle has engaged by recalling and utilizing memorized mannerisms acquired through past experience on a moment's notice.
Hand-to-Hand Combat (Advanced): Slade trained in hand-to-hand combat and when he was in the Army, he proved himself to be one of their best fighters.. Later he received martial arts training in various styles. After mastering these martial arts he furthered his studies when he sought an assassin known as Natas to train him in the ways of Ninja and had studied assassination techniques. His physical prowess is so great that he has defeated Batman in hand to hand combat.
Swordsmanship: Deathstroke is a highly trained swordsman; he is able to dual-wield a pair of katanas and to use them with deadly accuracy and an almost-superhuman speed.