杀手十三的画面风格非常类似于无主之地,都是采用了卡通渲染,而剧情方面则是改编自著名的漫画.在游戏中玩家可能会遇到一些困难，当玩家因为敌人太强而无法过关时，这就需要修改器.
使用说明:
H) Infinite HealthF10) Infinite Ammo
F1) Plague Enemy (see notes)
F3) 1 Hit Kill (see notes)
0) Breath under water (see notes)
M) Super Jump on (see notes)
N) Super Jump off
F7) Invisibility On (see notes)
F8) Invisibility Off
U) Fly Mode Start (Boost UP/DOWN) (see notes)
I) Fly Mode Down (Boost UP/DOWN) (see notes)
X) End Fly Mode (dont use this while high in the air
or u die when u hit the ground.)
B) Steady Scope On (see notes)
V) Steady Scope Off
J,K,L,O) Ghost Keys (see notes)
