This is a question many of us ask, Chimps are perfect for the simple reason of being the prime source of income for the Time Splitters franchise, they are seen alot of time within the game such as within it's challenge mode, where the chimps have multiple variations, including ninja monkey, cyborg chimp, brains, and the normal monkey chimp man. The chimp is a small character which grants players some form of advantage when playing in the arcade mode as the enemy must aim lower to hit them whereas they would be used to aiming at a character similar to their size.
The chimps graphics are very important, they are very simple yet enticing with their small faces. They can also perform certain monkey-like actions within the game such as small flips etc. The fact it is chimps holding and utilizing destructive weapons of war, such as the nuke used to devastate Nagasaki that provides a means of hooking the players in to these destructive yet cute chimps of annihilation
In conclusion, the chimps are cute yet advantaegeous when playing the game, they're prevalance makes them a core of the game, they feature in ways that make them well presented yet still retain their reputation for cool destroyers.