Fallout Tactics combat

Fallout Tactics combat is more complicated than combat in Fallout and Fallout 2. The basic combat mechanics is similar, but there are some serious differences. Fallout Tactics features three modes of combat: Continuous Turn-Based (CTB), Individual Turn-Based (ITB), and Squad Turn-Based (STB). In CTB, everyone can act at the same time, and action points are regenerated at a rate based on Agility. ITB is the system used in the original games. STB is a variation of that; each turn is given to a squad. Other changes include the ability to change stance, modifiers for height, and setting sentry modes, which let characters shoot automatically in CTB upon encountering an enemy.

Continuous Turn-Based mode
CTB is the default game mode. In this mode, all players and characters can act at the same time. Walking and Running do not cost action points, but all other actions do. Action points regenerate over time. Characters with more APs will regenerate them faster than characters with less action points.

Individual Turn-Based mode
ITB is the game mode most like the previous Fallout games. All characters will move one at a time, based on their sequence statistic. Characters may not move out of order, with the exception of the delay action command, which will move a character farther down the sequence list. Once every character has had a chance to move, all characters will regain all action points and the turn will start over from the top of the list.

Squad Turn-Based mode
STB is a variant of ITB. In this mode, all characters for a particular player will get a chance to move at the same time. When all characters in the squad have moved, the next player or the computer will get a chance to act. When all squads have moved, the turn will start over from the top with the first squad. ITB and STB are collectively called Turn-Based mode, or TB.

Stance
There are three different stances: stand, crouch and prone.

Characters in lower stance shoot more accurate, are harder to hit and sneak more effectively. They can also use low objects as cover.

On the other hand, they move slowly. Melee and unarmed attacks can't be done in prone stance. Characters that attacking from a very close range against a prone target, are more likely to do critical hits.

Sentry Mode
The game allows to assign sentry mode to each of squad members to manage his/her default behavior in CTB upon encountering an enemy. There are three different sentry modes - off, defensive and aggressive.

Sentry mode off: The character will ignore any enemy activity until receives no commands from player.

Sentry mode defensive: The character will alert you when an enemy is spotted by flashing their character tab. If this character is fired on, they will return fire.

Sentry mode aggressive: This character will actively fire on the enemy.

Characters on sentry mode will not fire if their chance to hit is lesser than the preset value. The possible values are: 95% (only fire if you’re almost assured of hitting), 66% (fire under good conditions), 33% (fire under possible conditions) and 1%.