Rapid Fire
From OGame Wiki
Most ships have the Rapid Fire feature. Simply put, while in combat, Rapid Fire is the ability of one unit to attack another unit multiple times in one turn.
You can check Rapid Fire in the special properties of ships in the Technology or Shipyard menus. If a ship has rapid fire, it will be followed by a type of target ship and a number. This number, its Rapid Fire rating, represents the average number of extra shots the firing ship can make against enemies of the target's type in a single combat round. It is a bit messy to understand, so the better way to do so is with an example.
Cruisers have Rapid Fire 10 against rocket launchers. We launch a cruiser against a defense of 2 rocket launchers and 1 small laser. Each defensive building will shoot once against the cruiser, as it is the only attacker. When it's the cruiser's turn, it chooses a target randomly from the three available targets. Let's suppose it chooses one of the rocket launchers. The cruiser shoots as normal but then, since it has rapid fire, it gets a dice roll to decide if it has another chance to shoot. Let's suppose the roll is successful, and it gets an extra shot (it is important to note that destroyed ships and defensive facilities are not removed from combat until the end of the round in which they are destroyed, meaning that that a ship [the Cruiser in this case] can target a defensive facility which has already been destroyed, effectively wasting the shot). Then it randomly chooses another target. Let's suppose this time it chooses the light laser. It'll shoot, but since cruisers do not have rapid fire against light lasers, doesn't get a rapid fire roll, and the round ends here. Had it chosen the rocket launcher it would have been granted the chance to roll dice again for an extra shot.
[edit] Statistics
The chance that the ship fires again depends on the Rapidfire rating against the target ship.
The relationship between Rapidfire and the percentage chance is 
where r is the Rapidfire rating.
So, a Small Cargo ship firing against an Espionage Probe has a 
= 
= 80% chance to fire again.
Here are the rapid fire ratings of all ships and defenses and the chance that if it destroys a certain Ship that it has of firing again.
[edit] Rapid Fire Comparisons
| Ship has Rapid Fire against: | Ships | Defenses | ||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Esp. Probe | Solar Sat. | SC | LC | LF | HF | Cr | BS | BC | CS | R | B | D | DS | Rocket Launcher | Light Laser | Heavy Laser | Ion Cannon | Gauss Cannon | Plasma Turret | Small Shield | Large Shield | |
| Small Cargo (SC) | 5 | 5 | ||||||||||||||||||||
| Large Cargo (LC) | 5 | 5 | ||||||||||||||||||||
| Light Fighter (LF) | 5 | 5 | ||||||||||||||||||||
| Heavy Fighter (HF) | 5 | 5 | 3 | |||||||||||||||||||
| Cruiser (CR) | 5 | 5 | 6 | 10 | ||||||||||||||||||
| Battle Ship (BS) | 5 | 5 | ||||||||||||||||||||
| Battlecruiser (BC) | 5 | 5 | 3 | 3 | 4 | 4 | 7 | |||||||||||||||
| Colony Ship (CS) | 5 | 5 | ||||||||||||||||||||
| Recycler (R) | 5 | 5 | ||||||||||||||||||||
| Bomber (B) | 5 | 5 | 20 | 20 | 10 | 10 | ||||||||||||||||
| Destroyer (D) | 5 | 5 | 2 | 10 | ||||||||||||||||||
| Death Star (DS) | 1250 | 1250 | 250 | 250 | 200 | 100 | 33 | 30 | 15 | 250 | 250 | 25 | 5 | 200 | 200 | 100 | 100 | 50 | ||||
| Rapid Fire | Chance to fire again |
|---|---|
| 1250 | 99.92% |
| 250 | 99.6% |
| 200 | 99.5% |
| 100 | 99.0% |
| 50 | 98.0% |
| 33 | 97.0% |
| 30 | 96.7% |
| 25 | 96.0% |
| 20 | 95.0% |
| 15 | 93.3% |
| 10 | 90.0% |
| 7 | 85.7% |
| 6 | 83.3% |
| 5 | 80% |
| 4 | 75% |
| 3 | 67% |
| 2 | 50% |
