diff --git a/headers/configData.h b/headers/configData.h
index 0d0d38a..52e8f5c 100644
--- a/headers/configData.h
+++ b/headers/configData.h
@@ -8,9 +8,8 @@
 typedef string configKey;
 
 struct ConfigData {
-	map<string, string> internalValues;
 
-	aliensGrid grid;
+	invadersGrid grid;
 
 	unsigned invadersSize;
 	unsigned invadersDistance;
@@ -24,8 +23,7 @@ struct ConfigData {
 	unsigned invadersSpeed;
 	unsigned playersSpeed;
 
-	PlayerDef p1Def;
-	PlayerDef p2Def;
+	vector<PlayerDef> playerDefs;
 	unsigned startXPosition;
 };
 
diff --git a/headers/errors.h b/headers/errors.h
deleted file mode 100644
index 1cd82c1..0000000
--- a/headers/errors.h
+++ /dev/null
@@ -1,6 +0,0 @@
-#ifndef SPACE_ERRORS_H
-#define SPACE_ERRORS_H
-
-
-
-#endif
diff --git a/headers/game.h b/headers/game.h
index b94eb95..170c9e7 100644
--- a/headers/game.h
+++ b/headers/game.h
@@ -4,11 +4,11 @@
 #include "mingl/mingl.h"
 #include "pixel_manager.h"
 #include "utils.h"
-#include "position.h"
 #include "player_def.h"
 #include "player.h"
 #include "play_mode.h"
 #include "configData.h"
+#include "projectiles.h"
 
 using namespace std;
 
@@ -19,15 +19,14 @@ private:
 	ConfigData confData;
 
 	position basePos;
-	aliensGrid grid;
+	invadersGrid grid;
 	bool direction = true;
 
     vector<missile> missiles;
     vector<torpedo> torpedos;
 
 	PlayMode playMode;
-	Player p1;
-	Player p2;
+	vector<Player> players;
 
 	void managePlayers();
 	bool manageInvaders();
@@ -41,7 +40,7 @@ private:
 	bool checkTorpedosAndInvaders();
 	bool invadersTouchPlayer();
 
-	void managePlayerMoves(PlayerDef&, unsigned&);
+	void managePlayerMoves(PlayerDef&, unsigned&, unsigned);
 
 public:
 	// in case someone wants to mess with the code, here's a minimal API, costs nothing to us
diff --git a/headers/player.h b/headers/player.h
index b4e905b..41e8a8a 100644
--- a/headers/player.h
+++ b/headers/player.h
@@ -5,7 +5,9 @@ struct Player{
 	unsigned lives;
 	unsigned x;
 	unsigned id;
-	unsigned score;
+	unsigned score=0;
+
+	unsigned deathAnimCounter=0;
 };
 
 #endif
\ No newline at end of file
diff --git a/headers/position.h b/headers/position.h
deleted file mode 100644
index e757520..0000000
--- a/headers/position.h
+++ /dev/null
@@ -1,13 +0,0 @@
-#ifndef GUARD_POSITION_H
-#define GUARD_POSITION_H
-
-#include<mingl/mingl.h>
-
-class position : public nsGraphics::Vec2D {
-public:
-	position() = default;
-	position(int x, int y);
-	bool isColliding(position& p, int rx, int ry);
-};
-
-#endif
diff --git a/headers/projectiles.h b/headers/projectiles.h
new file mode 100644
index 0000000..f30583f
--- /dev/null
+++ b/headers/projectiles.h
@@ -0,0 +1,14 @@
+#ifndef GUARD_PROJECTILES_H
+#define GUARD_PROJECTILES_H
+
+#include "utils.h"
+
+typedef position missile;
+
+class torpedo : public position {
+public:
+	playerID owner;
+	torpedo(int x, int y, playerID owner);
+};
+
+#endif
diff --git a/headers/utils.h b/headers/utils.h
index 3879830..9eea98c 100644
--- a/headers/utils.h
+++ b/headers/utils.h
@@ -1,9 +1,8 @@
-#ifndef GUARD_STRUCTS_H
-#define GUARD_STRUCTS_H
+#ifndef GUARD_UTILS_H
+#define GUARD_UTILS_H
 
 #include<vector>
 #include<mingl/mingl.h>
-#include"position.h"
 
 // hardcoded values
 #define PLAYER_HEIGHT 100
@@ -17,17 +16,11 @@ enum WinValue{
 
 using namespace std;
 
-typedef unsigned Alien;
-typedef vector<Alien> aliensLine;
-typedef vector<aliensLine> aliensGrid;
-
-typedef position missile;
-
-class torpedo : public nsGraphics::Vec2D {
-public:
-	topedo(int x, int y);
-	unsigned playerID;
-};
+typedef unsigned Invader;
+typedef vector<Invader> invadersColumn;
+typedef vector<invadersColumn> invadersGrid;
+typedef nsGraphics::Vec2D position;
+typedef unsigned playerID;
 
 // didn't want to use position because of the semantic with x and y
 bool lineCollideCheck(unsigned start1, unsigned end1, unsigned start2, unsigned end2);
diff --git a/src/configManagement.cpp b/src/configManagement.cpp
index 1ff8118..80343c5 100644
--- a/src/configManagement.cpp
+++ b/src/configManagement.cpp
@@ -78,15 +78,18 @@ void ConfigBuilder::readConfig() {
 	collectedData.startXPosition = getInt("players.startXPosition");
 	collectedData.playersSpeed = getInt("players.speed");
 
-	collectedData.p1Def.color = getColor("players.user1.color");
-	collectedData.p1Def.keys.left = getChar("players.user1.keys.left");
-	collectedData.p1Def.keys.right = getChar("players.user1.keys.right");
-	collectedData.p1Def.keys.shoot = getChar("players.user1.keys.shoot");
+	// the scalability behind the vector of players is only an illusion, because we force player count to be 1 or 2
+	// It was done so the 2+ players implementation could be easier in the future, if wanted
+	collectedData.playerDefs.resize(2);
+	collectedData.playerDefs[1].color = getColor("players.user1.color");
+	collectedData.playerDefs[1].keys.left = getChar("players.user1.keys.left");
+	collectedData.playerDefs[1].keys.right = getChar("players.user1.keys.right");
+	collectedData.playerDefs[1].keys.shoot = getChar("players.user1.keys.shoot");
 
-	collectedData.p2Def.color = getColor("players.user2.color");
-	collectedData.p2Def.keys.left = getChar("players.user2.keys.left");
-	collectedData.p2Def.keys.right = getChar("players.user2.keys.right");
-	collectedData.p2Def.keys.shoot = getChar("players.user2.keys.shoot");
+	collectedData.playerDefs[2].color = getColor("players.user2.color");
+	collectedData.playerDefs[2].keys.left = getChar("players.user2.keys.left");
+	collectedData.playerDefs[2].keys.right = getChar("players.user2.keys.right");
+	collectedData.playerDefs[2].keys.shoot = getChar("players.user2.keys.shoot");
 
 	// invaders
 	collectedData.invadersSize = getInt("invaders.size");
diff --git a/src/game_basics.cpp b/src/game_basics.cpp
index 2c21dd7..dbb57f0 100644
--- a/src/game_basics.cpp
+++ b/src/game_basics.cpp
@@ -58,7 +58,7 @@ bool Game::deathMenuHandler(){
 }
 
 bool Game::invadersTouchPlayer(){
-	for(aliensLine& line : grid){
+	for(invadersColumn& line : grid){
 		if(basePos.getY()+ line.size() * confData.invadersSize >= pm.getScreenHeight() - PLAYER_HEIGHT){
 			return true;
 		}
@@ -76,12 +76,15 @@ WinValue Game::playGame(){ // returns when game is finished
 	// we assume the game has been played before, and so we need to clean used members
 	grid = confData.grid; // will copy the vector
 
-	p1.x = confData.startXPosition;
 
-	if(playMode!=SINGLE){
+	if(playMode==SINGLE){
+		players.resize(1);
+	}else{
+		players.resize(2);
 		// mirror the start X position for the other
-		p2.x = pm.getScreenWidth() - confData.startXPosition - confData.playersWidth;
+		players[1].x = pm.getScreenWidth() - confData.startXPosition - confData.playersWidth;
 	}
+	players[0].x = confData.startXPosition;
 
 	basePos = position(0,0);
 
@@ -118,7 +121,7 @@ WinValue Game::playGame(){ // returns when game is finished
 void Game::display() {
 	for (unsigned i = 0; i < this->grid.size(); ++i){
 		for (unsigned j = 0; j < this->grid[i].size(); ++j){
-			nsGraphics::Vec2D vec =nsGraphics::Vec2D(
+			nsGraphics::Vec2D vec(
 					basePos.getX() + i * confData.invadersSize + i * confData.invadersDistance,
 					basePos.getY() + j * confData.invadersSize + j * confData.invadersDistance
 			);
@@ -138,6 +141,8 @@ void Game::display() {
 			}
 		}
 	}
-	pm.dessinerJoueur(position(p1.x, 0), confData.playersWidth, confData.p1Def.color);
-	if(playMode!=SINGLE)pm.dessinerJoueur(position(p2.x, 0), confData.playersWidth, confData.p2Def.color);
+
+	for(size_t i=0;i<players.size();++i){
+		pm.dessinerJoueur(position(players[i].x, 0), confData.playersWidth, confData.playerDefs[i].color);
+	}
 }
\ No newline at end of file
diff --git a/src/game_managers.cpp b/src/game_managers.cpp
index 920193e..f4b6210 100644
--- a/src/game_managers.cpp
+++ b/src/game_managers.cpp
@@ -16,15 +16,18 @@ void Game::managePlayerMoves(PlayerDef& pdef, unsigned& playerX, unsigned player
 		else playerX = playerX + confData.playersSpeed;
 	}
 	if(ISPRESSED(pdef.keys.shoot)){
-		torpedos.emplace_back(playerX + confData.playersWidth / 2, pm.getScreenHeight() - PLAYER_HEIGHT, playerId );
+		torpedos.emplace_back(playerX + confData.playersWidth / 2, pm.getScreenHeight() - PLAYER_HEIGHT, playerId);
 	}
 }
 
 /** Makes the players play once
 */
 void Game::managePlayers(){
-	managePlayerMoves(confData.p1Def, p1.x,p1.id);
-	if(playMode==PlayMode::TWO_LOCAL)managePlayerMoves(confData.p2Def, p2.x, p2.id);
+	managePlayerMoves(confData.playerDefs[0], players[0].x,0);
+	if(playMode==PlayMode::TWO_LOCAL)managePlayerMoves(confData.playerDefs[1], players[1].x, 1);
+	else if(playMode==PlayMode::TWO_TCPIP){
+		// TODO TCPIP
+	}
 }
 
 /** Makes the invaders play once, and check lower bounds
@@ -34,10 +37,10 @@ void Game::managePlayers(){
 bool Game::manageInvaders(){
 	if(direction){ // go to the right
 		int end = basePos.getX(); // start position
-		end+= grid.size() * confData.invadersSize; // add the aliens
-		end+= (grid.size()-1) * confData.invadersDistance; // add the invadersDistance between aliens
+		end+= grid.size() * confData.invadersSize; // add the invaders
+		end+= (grid.size()-1) * confData.invadersDistance; // add the invadersDistance between invaders
 
-		// you got the end position of the alien crowd !
+		// you got the end position of the invader crowd !
 
 		if(end + confData.invadersSpeed < pm.getScreenWidth()){
 			basePos.setX(basePos.getX() + confData.invadersSpeed);
@@ -69,7 +72,7 @@ void Game::remCollidingProjectiles(){
 	auto tor = torpedos.begin();
 
 	while(miss != missiles.end()){
-		bool wasColling = false;
+		bool wasColliding = false;
 		while(tor != torpedos.end()){
 
 			// missiles can't be right under torpedos, so that must means they are colliding in Y
@@ -81,7 +84,7 @@ void Game::remCollidingProjectiles(){
 					tor->getX(), tor->getX() + confData.torpedosWidth)){
 				missiles.erase(miss);
 				torpedos.erase(tor);
-				wasColling = true;
+				wasColliding = true;
 				break;
 			}
 			++tor;
@@ -89,7 +92,7 @@ void Game::remCollidingProjectiles(){
 		/* if it was colling, it was removed and his position is now replaced by the next.
 		 * else, go to the next
 		 */
-		if(!wasColling)++miss;
+		if(!wasColliding)++miss;
 	}
 }
 
@@ -116,18 +119,51 @@ void Game::moveTorpedos() {
 }
 
 bool Game::checkMissilesAndPlayers() {
-	for(missile& miss : missiles){
-		if(miss.getY()<=PLAYER_HEIGHT){ // colliding on Y
-			if(lineCollideCheck( // now check collision on X
-					miss.getX(), miss.getX() + confData.missilesWidth,
-					p1.x, p1.x + confData.playersWidth)){
-				return true;
+	auto miss_ite = missiles.begin();
+	while(miss_ite!=missiles.end()){
+		if(miss_ite->getY()<=PLAYER_HEIGHT){ // check collision on Y
+			// now check collision on X (with both players)
+			bool wasColliding = false;
+			for(Player& p : players){
+				if(lineCollideCheck(
+						miss_ite->getX(), miss_ite->getX() + confData.missilesWidth,
+						p.x, p.x + confData.playersWidth)){
+					wasColliding = true;
+					if(p.deathAnimCounter)p.deathAnimCounter = 1;
+					// do not break, the second player also deserves to be hit
+				}
 			}
+			if(wasColliding)missiles.erase(miss_ite);
+			else ++miss_ite;
 		}
 	}
-	return false;
 }
 
 bool Game::checkTorpedosAndInvaders() {
+	auto tor_ite = torpedos.begin();
+	while(tor_ite!=torpedos.end()){
+		unsigned i=0;
+		for(;i<grid.size();++i){
+			// calculate top-left position of invader
+			position pos = basePos+position(
+					confData.invadersSize*(grid[i].size()-1)+confData.invadersDistance*(grid[i].size()-1),
+					confData.invadersSize*(grid[i].size()-1)+confData.invadersDistance*(grid[i].size()-1));
+			// check collision on Y (invaders can actually be "under" torpedos, so we check both lower and upper bounds
+			if(pos.getY()+confData.invadersSize>=tor_ite->getY() &&
+					pos.getY()<=tor_ite->getY()+confData.torpedosLength){
+				// now check collision on X
+				if(lineCollideCheck( // now check collision on X
+						tor_ite->getX(), tor_ite->getX() + confData.torpedosWidth,
+						pos.getX(), pos.getX() + confData.invadersSize)){
+					break;
+				}
+			}
+		}
+		if(i==grid.size()) ++tor_ite;
+		else{
+			torpedos.erase(tor_ite);
+			grid[i].pop_back();
+		}
+	}
 	return false;
 }
\ No newline at end of file
diff --git a/src/main.cpp b/src/main.cpp
index 6b49215..c5d06ab 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -2,6 +2,7 @@
 #include "game.h"
 using namespace std;
 
+// TODO changer tout les unsigned par des size_t dans les boucles
 int main(){
 	Game g;
 	g.managedGames();
diff --git a/src/position.cpp b/src/position.cpp
deleted file mode 100644
index 3cea989..0000000
--- a/src/position.cpp
+++ /dev/null
@@ -1,8 +0,0 @@
-#include "position.h"
-#include <mingl/mingl.h>
-
-bool position::isColliding(position& p, int rx, int ry) {
-	return nsGraphics::Vec2D::isColliding(p, p+nsGraphics::Vec2D(rx, ry));
-}
-
-position::position(int x, int y) : Vec2D(x, y) {}
diff --git a/src/projectiles.cpp b/src/projectiles.cpp
new file mode 100644
index 0000000..f7afa18
--- /dev/null
+++ b/src/projectiles.cpp
@@ -0,0 +1,5 @@
+#include "projectiles.h"
+
+torpedo::torpedo(int x, int y, playerID owner) : position(x, y) {
+	this->owner = owner;
+}
diff --git a/src/utils.cpp b/src/utils.cpp
index 42910ad..b39d7ae 100644
--- a/src/utils.cpp
+++ b/src/utils.cpp
@@ -1,7 +1,5 @@
 #include "utils.h"
 
-torpedo::torpedo(int x, int y) : position(x, y) {}
-
 bool lineCollideCheck(unsigned start1, unsigned end1, unsigned start2, unsigned end2){
 	return start1 < end2 != start2 < end1;
 	// if true, are colliding. I like truth tables