diff --git a/scripts/gen_keys.py b/scripts/gen_keys.py
index 3325f27c3c..f1c2cfd855 100644
--- a/scripts/gen_keys.py
+++ b/scripts/gen_keys.py
@@ -1,6 +1,6 @@
 import sys, os
 
-# genereate keys.h file
+# generate keys.h file
 f = file("src/engine/keys.h", "w")
 
 keynames = []
diff --git a/src/base/hash_libtomcrypt.c b/src/base/hash_libtomcrypt.c
index 7482bcd182..50bf770d40 100755
--- a/src/base/hash_libtomcrypt.c
+++ b/src/base/hash_libtomcrypt.c
@@ -169,7 +169,7 @@ static void sha_done(sha256_state* md, void* out)
         md->curlen = 0;
     }
 
-    // Pad upto 56 bytes of zeroes
+    // Pad up to 56 bytes of zeroes
     while(md->curlen < 56)
         md->buf[md->curlen++] = 0;
 
diff --git a/src/base/system.h b/src/base/system.h
index 65ce02456f..8743de4b51 100644
--- a/src/base/system.h
+++ b/src/base/system.h
@@ -225,7 +225,7 @@ IOHANDLE io_open(const char *filename, int flags);
 
 	Parameters:
 		io - Handle to the file to read data from.
-		buffer - Pointer to the buffer that will recive the data.
+		buffer - Pointer to the buffer that will receive the data.
 		size - Number of bytes to read from the file.
 
 	Returns:
@@ -528,7 +528,7 @@ int64 time_freq();
 
 /*
 	Function: time_timestamp
-		Retrives the current time as a UNIX timestamp
+		Retrieves the current time as a UNIX timestamp
 
 	Returns:
 		The time as a UNIX timestamp
@@ -600,7 +600,7 @@ typedef struct
 void net_invalidate_socket(NETSOCKET *socket);
 /*
 	Function: net_init
-		Initiates network functionallity.
+		Initiates network functionality.
 
 	Returns:
 		Returns 0 on success,
@@ -699,13 +699,13 @@ int net_udp_send(NETSOCKET sock, const NETADDR *addr, const void *data, int size
 
 /*
 	Function: net_udp_recv
-		Recives a packet over an UDP socket.
+		Receives a packet over an UDP socket.
 
 	Parameters:
 		sock - Socket to use.
-		addr - Pointer to an NETADDR that will recive the address.
-		data - Pointer to a buffer that will recive the data.
-		maxsize - Maximum size to recive.
+		addr - Pointer to an NETADDR that will receive the address.
+		data - Pointer to a buffer that will receive the data.
+		maxsize - Maximum size to receive.
 
 	Returns:
 		On success it returns the number of bytes recived. Returns -1
@@ -886,18 +886,18 @@ int str_length(const char *str);
 
 /*
 	Function: str_format
-		Performs printf formating into a buffer.
+		Performs printf formatting into a buffer.
 
 	Parameters:
-		buffer - Pointer to the buffer to recive the formated string.
+		buffer - Pointer to the buffer to receive the formatted string.
 		buffer_size - Size of the buffer.
-		format - printf formating string.
-		... - Parameters for the formating.
+		format - printf formatting string.
+		... - Parameters for the formatting.
 
 	Remarks:
-		- See the C manual for syntax for the printf formating string.
-		- The strings are treated as zero-terminated strings.
-		- Garantees that dst string will contain zero-termination.
+		- See the C manual for syntax for the printf formatting string.
+		- The strings are treated as zero-termineted strings.
+		- Guarantees that dst string will contain zero-termination.
 */
 void str_format(char *buffer, int buffer_size, const char *format, ...)
 GNUC_ATTRIBUTE((format(printf, 3, 4)));
@@ -1244,7 +1244,7 @@ const char *str_find(const char *haystack, const char *needle);
 		data - Size of the data
 
 	Remarks:
-		- The desination buffer will be zero-terminated
+		- The destination buffer will be zero-terminated
 */
 void str_hex(char *dst, int dst_size, const void *data, int data_size);
 
diff --git a/src/base/tl/array.h b/src/base/tl/array.h
index 230e521009..2040be22dd 100644
--- a/src/base/tl/array.h
+++ b/src/base/tl/array.h
@@ -268,7 +268,7 @@ class array : private ALLOCATOR
 
 	/*
 		Function: optimize
-			Removes unnessasary data, returns how many bytes was earned.
+			Removes unnecessary data, returns how many bytes was earned.
 
 		Remarks:
 			- Invalidates ranges
diff --git a/src/engine/client.h b/src/engine/client.h
index cd9f684e3a..7ca6201142 100644
--- a/src/engine/client.h
+++ b/src/engine/client.h
@@ -46,7 +46,7 @@ class IClient : public IInterface
 		STATE_LOADING - The client has connected to a server and is loading resources.
 		STATE_ONLINE - The client is connected to a server and running the game.
 		STATE_DEMOPLAYBACK - The client is playing a demo
-		STATE_QUITING - The client is quiting.
+		STATE_QUITING - The client is quitting.
 	*/
 
 	enum
diff --git a/src/engine/client/backend_sdl.h b/src/engine/client/backend_sdl.h
index 1f3647b874..6e64123c1d 100644
--- a/src/engine/client/backend_sdl.h
+++ b/src/engine/client/backend_sdl.h
@@ -42,7 +42,7 @@
 class CGraphicsBackend_Threaded : public IGraphicsBackend
 {
 public:
-	// constructed on the main thread, the rest of the functions is runned on the render thread
+	// constructed on the main thread, the rest of the functions is run on the render thread
 	class ICommandProcessor
 	{
 	public:
diff --git a/src/engine/client/sound.cpp b/src/engine/client/sound.cpp
index 39b1bb68fc..f5c126c7b4 100644
--- a/src/engine/client/sound.cpp
+++ b/src/engine/client/sound.cpp
@@ -312,7 +312,7 @@ void CSound::RateConvert(int SampleID)
 
 	for(int i = 0; i < NumFrames; i++)
 	{
-		// resample TODO: this should be done better, like linear atleast
+		// resample TODO: this should be done better, like linear at least
 		float a = i/(float)NumFrames;
 		int f = (int)(a*pSample->m_NumFrames);
 		if(f >= pSample->m_NumFrames)
diff --git a/src/engine/docs/prediction.txt b/src/engine/docs/prediction.txt
index e740b1e8fd..637c559693 100644
--- a/src/engine/docs/prediction.txt
+++ b/src/engine/docs/prediction.txt
@@ -2,7 +2,7 @@ Title: Prediction
 
 The engine calls <modc_predict> when reprediction is required. This happens usally when new data has arrived from the server. <modc_predict> should to prediction from the current snapshot and current snapshot tick (<client_tick> + 1) upto and including the tick returned by <client_predtick>.
 
-Predicted input sent to the server can be retrived by calling <client_get_input> with the corresponding tick that you want the input for. Here is a simple example of how it might look.
+Predicted input sent to the server can be retrieved by calling <client_get_input> with the corresponding tick that you want the input for. Here is a simple example of how it might look.
 
 > void modc_predict()
 > {
diff --git a/src/engine/docs/snapshots.txt b/src/engine/docs/snapshots.txt
index 46ee3105ca..35dd585206 100644
--- a/src/engine/docs/snapshots.txt
+++ b/src/engine/docs/snapshots.txt
@@ -4,7 +4,7 @@ Section: Overview
 
 Topic: Definitions
 
-- *Snapshot*. A is a serialized game state from which a client can render the game from. They are sent from the server at a regular interval and is created specificly for each client in order to reduce bandwidth.
+- *Snapshot*. A is a serialized game state from which a client can render the game from. They are sent from the server at a regular interval and is created specifically for each client in order to reduce bandwidth.
 - *Delta Snapshot*. A set of data that can be applied to a snapshot in order to create a new snapshot with the updated game state.
 
 Topic: Structure
diff --git a/src/engine/external/important.txt b/src/engine/external/important.txt
index 305ccadcc6..41b9c6a11a 100644
--- a/src/engine/external/important.txt
+++ b/src/engine/external/important.txt
@@ -1,5 +1,5 @@
 The source code under this directory are external libraries
 with their own licences. The source you find here is stripped
-of unnessesary information. Please visit their websites for
+of unnecessary information. Please visit their websites for
 more information and official releases.
 
diff --git a/src/engine/kernel.h b/src/engine/kernel.h
index b5961bc372..de3696db78 100644
--- a/src/engine/kernel.h
+++ b/src/engine/kernel.h
@@ -44,7 +44,7 @@ class IKernel
 	static IKernel *Create();
 	virtual ~IKernel() {}
 
-	// templated access to handle pointer convertions and interface names
+	// templated access to handle pointer conversions and interface names
 	template<class TINTERFACE>
 	bool RegisterInterface(TINTERFACE *pInterface)
 	{
diff --git a/src/engine/server/server.cpp b/src/engine/server/server.cpp
index da886374e9..869114272a 100644
--- a/src/engine/server/server.cpp
+++ b/src/engine/server/server.cpp
@@ -124,7 +124,7 @@ void CSnapIDPool::FreeID(int ID)
 {
 	if(ID < 0)
 		return;
-	dbg_assert(m_aIDs[ID].m_State == 1, "id is not alloced");
+	dbg_assert(m_aIDs[ID].m_State == 1, "id is not allocated");
 
 	m_InUsage--;
 	m_aIDs[ID].m_State = 2;
@@ -551,7 +551,7 @@ void CServer::DoSnapshot()
 	// create snapshots for all clients
 	for(int i = 0; i < MAX_CLIENTS; i++)
 	{
-		// client must be ingame to recive snapshots
+		// client must be ingame to receive snapshots
 		if(m_aClients[i].m_State != CClient::STATE_INGAME)
 			continue;
 
@@ -591,7 +591,7 @@ void CServer::DoSnapshot()
 			// save it the snapshot
 			m_aClients[i].m_Snapshots.Add(m_CurrentGameTick, time_get(), SnapshotSize, pData, 0);
 
-			// find snapshot that we can preform delta against
+			// find snapshot that we can perform delta against
 			EmptySnap.Clear();
 
 			{
diff --git a/src/engine/server/server.h b/src/engine/server/server.h
index 6bdb468d1a..7e8d341518 100644
--- a/src/engine/server/server.h
+++ b/src/engine/server/server.h
@@ -17,7 +17,7 @@ class CSnapIDPool
 	{
 	public:
 		short m_Next;
-		short m_State; // 0 = free, 1 = alloced, 2 = timed
+		short m_State; // 0 = free, 1 = allocated, 2 = timed
 		int m_Timeout;
 	};
 
diff --git a/src/engine/shared/netban.cpp b/src/engine/shared/netban.cpp
index 6b27616d5d..7a5d5f5a3a 100644
--- a/src/engine/shared/netban.cpp
+++ b/src/engine/shared/netban.cpp
@@ -460,7 +460,7 @@ bool CNetBan::IsBanned(const NETADDR *pAddr, char *pBuf, unsigned BufferSize, in
 	CNetHash aHash[17];
 	int Length = CNetHash::MakeHashArray(pAddr, aHash);
 
-	// check ban adresses
+	// check ban addresses
 	CBanAddr *pBan = m_BanAddrPool.Find(pAddr, &aHash[Length]);
 	if(pBan)
 	{
diff --git a/src/engine/shared/network_conn.cpp b/src/engine/shared/network_conn.cpp
index f7f8dfec64..8e3bfd1d0c 100644
--- a/src/engine/shared/network_conn.cpp
+++ b/src/engine/shared/network_conn.cpp
@@ -398,7 +398,7 @@ int CNetConnection::Update()
 		}
 		else
 		{
-			// resend packet if we havn't got it acked in 1 second
+			// resend packet if we haven't got it acked in 1 second
 			if(Now-pResend->m_LastSendTime > time_freq())
 				ResendChunk(pResend);
 		}
diff --git a/src/engine/shared/protocol.h b/src/engine/shared/protocol.h
index 145474bd8e..bfdec29e35 100644
--- a/src/engine/shared/protocol.h
+++ b/src/engine/shared/protocol.h
@@ -6,7 +6,7 @@
 #include <base/system.h>
 
 /*
-	Connection diagram - How the initilization works.
+	Connection diagram - How the initialization works.
 
 	Client -> INFO -> Server
 		Contains version info, name, and some other info.
@@ -20,7 +20,7 @@
 		modc_connected is called on the client and
 		mods_connected is called on the server.
 		The client should call client_entergame when the
-		mod has done it's initilization.
+		mod has done it's initialization.
 
 	Client -> ENTERGAME -> Server
 		Tells the server to start sending snapshots.
diff --git a/src/engine/shared/ringbuffer.cpp b/src/engine/shared/ringbuffer.cpp
index b9f55d73ac..a164a83e5b 100644
--- a/src/engine/shared/ringbuffer.cpp
+++ b/src/engine/shared/ringbuffer.cpp
@@ -145,7 +145,7 @@ int CRingBufferBase::PopFirst()
 		m_pConsume = NextBlock(m_pConsume);
 	}
 
-	// in the case that we have catched up with the produce pointer
+	// in the case that we have caught up with the produce pointer
 	// we might stand on a free block so merge em
 	MergeBack(m_pConsume);
 	return 1;
diff --git a/src/game/client/components/chat.cpp b/src/game/client/components/chat.cpp
index 77a2d1617b..bc250bc5b4 100644
--- a/src/game/client/components/chat.cpp
+++ b/src/game/client/components/chat.cpp
@@ -607,7 +607,7 @@ void CChat::AddLine(const char *pLine, int ClientID, int Mode, int TargetID)
 	while(*p)
 	{
 		pLine = p;
-		// find line seperator and strip multiline
+		// find line separator and strip multiline
 		while(*p)
 		{
 			if(*p++ == '\n')
diff --git a/src/game/client/components/items.cpp b/src/game/client/components/items.cpp
index 1bf67eb236..e6560f5eb7 100644
--- a/src/game/client/components/items.cpp
+++ b/src/game/client/components/items.cpp
@@ -41,7 +41,7 @@ void CItems::RenderProjectile(const CNetObj_Projectile *pCurrent, int ItemID)
 		s_LastGameTickTime = Client()->GameTickTime();
 	float Ct = (Client()->PrevGameTick()-pCurrent->m_StartTick)/(float)SERVER_TICK_SPEED + s_LastGameTickTime;
 	if(Ct < 0)
-		return; // projectile havn't been shot yet
+		return; // projectile haven't been shot yet
 
 	vec2 StartPos(pCurrent->m_X, pCurrent->m_Y);
 	vec2 StartVel(pCurrent->m_VelX/100.0f, pCurrent->m_VelY/100.0f);
diff --git a/src/game/client/components/sounds.cpp b/src/game/client/components/sounds.cpp
index 0acb9c56a9..bdbcc89f8c 100644
--- a/src/game/client/components/sounds.cpp
+++ b/src/game/client/components/sounds.cpp
@@ -113,7 +113,7 @@ void CSounds::OnRender()
 			return;
 	}
 
-	// set listner pos
+	// set listener pos
 	vec2 Pos = *m_pClient->m_pCamera->GetCenter();
 	Sound()->SetListenerPos(Pos.x, Pos.y);
 
diff --git a/src/game/client/gameclient.cpp b/src/game/client/gameclient.cpp
index 5e203c274d..24f36460e6 100644
--- a/src/game/client/gameclient.cpp
+++ b/src/game/client/gameclient.cpp
@@ -88,7 +88,7 @@ void FormatTimeDiff(char *pBuf, int Size, int Time, int Precision, bool ForceSig
 	AppendDecimals(pBuf, Size, Time, Precision);
 }
 
-// instanciate all systems
+// instantiate all systems
 static CInfoMessages gs_InfoMessages;
 static CCamera gs_Camera;
 static CChat gs_Chat;
diff --git a/src/game/editor/editor.cpp b/src/game/editor/editor.cpp
index 9becd3e2a4..0054ce6363 100644
--- a/src/game/editor/editor.cpp
+++ b/src/game/editor/editor.cpp
@@ -920,7 +920,7 @@ void CEditor::DoToolbar(CUIRect ToolBar)
 	// tile info button
 	TB_Top.VSplitLeft(40.0f, &Button, &TB_Top);
 	static int s_TileInfoButton = 0;
-	if(DoButton_Editor(&s_TileInfoButton, "Info", m_ShowTileInfo, &Button, 0, "[ctrl+i] Show tile informations") ||
+	if(DoButton_Editor(&s_TileInfoButton, "Info", m_ShowTileInfo, &Button, 0, "[ctrl+i] Show tile information") ||
 		(Input()->KeyPress(KEY_I) && (Input()->KeyIsPressed(KEY_LCTRL) || Input()->KeyIsPressed(KEY_RCTRL))))
 	{
 		m_ShowTileInfo = !m_ShowTileInfo;