Gameplay
The Crusader games are divided into missions, each with their own locations and objectives. Settings vary from factories to military bases to offices to space stations, and contain a variety of enemy soldiers and servomechs, traps, puzzles and non-combatants (who can be killed with no penalty, and in No Remorse their bodies can be looted for credits which are used to purchase better weapons). All locations have alarm systems which can be triggered by actions such as walking into view of security cameras, weapons fire, or destroying a secured door. Setting off an alarm will bring down significant military presence and the player is encouraged to avoid triggering them or to deactivate them as soon as possible.
The game featured a previously unprecedented level of setting interaction. Most of the environment can be destroyed by weapons fire and some traps or defenses can be manipulated for use against the enemy. The geography of the setting encourages the use of tactics and combinations of moves in order to hit the targets effectively with the minimum possible loss of resources. No Regret added a handful of new maneuvers to the original game, including the ability to dive forward, and to sidestep while crouching. Weapons, ammunition, credits (No Remorse's form of money, which does not appear in No Regret), healing facilities, and other equipment is scattered through the levels, allowing the player to upgrade their arsenal.
No Regret added several new weapons and death animations, including freezing (and subsequent shattering) and two different kinds of melting. In No Remorse, the Silencer could carry no more than five firearms at once; in No Regret, this restriction was lifted entirely.
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