Rex is one of the Elite Enemies, being introduced at level 30. Rex is one of the many and most difficult elite enemies in the game. As with many Elite Enemies, however particularly with Rex, attacking him head-on is suicidal, unless he is severely weakened and is not focusing on you.
He has the veteran head, vest, and private pants (brown). This provides him with a 5% accuracy bonus and a 2% health bonus, from the Veteran and Vest respectively.
Rex can be persistently troublesome for players that are inexperienced against explosives. His Howitzer Gun used to be the deadliest weapon in the game (when it was the last weapon available, at level 30).
But his weakness is that he doesn't know if you're behind him. He also doesn't have much armor (only +2% bonus) and ammo which is only 6 for his Howitzer Gun. He is very slow and vulnerable to close-ranged weapons Blunderbuss, Revolver, or the Double Barrel Shotgun. But if he spots you in long range, his Howitzer Gun is a serious threat. Another easy way to kill him is to directly hit him with the Missile Launcher or your own Howitzer Gun and he dies very quickly. The best time to strike is when he is reloading his Howitzer Gun as the gun takes 4 seconds to reload and it is a great amount of time for you to lower his health or to finish him.
Rex is replaced with Blizzard once the player is level 32.
- Rex's appearance is a reference to the main protagonist from the movie Rambo.
- Rex's weapon of choice is now weakened by the new Anti-Explosive Pack, if a player uses it and gained it.
- In one of Summer Camp's loading screen, Rex is present with the Scoped Rocket Launcher instead of the Howitzer Gun and uses the Death Company instead of the Vest. He appeared along with a beta-ish Mike Hunter with the Green Beret and a a beta-ish Vulcan Dynamite with the Always Ready and a Double Barrel Shotgun
- Rex is one of the most difficult boss to defeat, since he uses the Howitzer gun which is an extremely fatal and powerful gun to bots and the player.
|List of Bots|
|Regular Bots||Mike Hunter · Vicenzo Caesar · Vulcan Dynamite · Masked Viper · Rocket Crush · Snake Predator · Raptor Blaze|
|Elite Bots||Bronco · Bio Hazard · Hammer · Mad Cop · Flame · Eagle · Rex · Nightmare · Blizzard · Whiplash|
|Multiplayer Bots||Ghost · Slimer · Stay Puft Marshmallow Man · Ghost Nian · Hungry Nian · Great Nian · Werewolf · Easter Bunny · The Yeti · The Cyborg · The Ninja · Fluffy · The Cyber-Hunter|