diff --git a/src/main/java/lwjake2/client/CL_parse.java b/src/main/java/lwjake2/client/CL_parse.java
index 78b5b60..4c5443f 100644
--- a/src/main/java/lwjake2/client/CL_parse.java
+++ b/src/main/java/lwjake2/client/CL_parse.java
@@ -316,7 +316,7 @@ public class CL_parse {
         // game directory
         str = MSG.ReadString(Globals.net_message);
         Globals.cl.gamedir = str;
-        Com.dprintln("gamedir=" + str);
+        log.debug("gamedir={}", str);
 
         // set gamedir
         if (str.length() > 0
@@ -329,10 +329,10 @@ public class CL_parse {
 
         // parse player entity number
         Globals.cl.playernum = MSG.ReadShort(Globals.net_message);
-        Com.dprintln("numplayers=" + Globals.cl.playernum);
+        log.debug("numplayers=", Globals.cl.playernum);
         // get the full level name
         str = MSG.ReadString(Globals.net_message);
-        Com.dprintln("levelname=" + str);
+        log.debug("levelname={}", str);
 
         if (Globals.cl.playernum == -1) { // playing a cinematic or showing a
             // pic, not a level
diff --git a/src/main/java/lwjake2/game/Cmd.java b/src/main/java/lwjake2/game/Cmd.java
index e4e1344..18d6c1b 100644
--- a/src/main/java/lwjake2/game/Cmd.java
+++ b/src/main/java/lwjake2/game/Cmd.java
@@ -635,7 +635,7 @@ public final class Cmd {
         s = Cmd.Args();
 
         it = GameItems.FindItem(s);
-        Com.dprintln("using:" + s);
+        log.debug("using:{}", s);
         if (it == null) {
             SV_GAME.PF_cprintfhigh(ent, "unknown item: " + s + "\n");
             return;
diff --git a/src/main/java/lwjake2/game/GameItems.java b/src/main/java/lwjake2/game/GameItems.java
index b37087d..4eef106 100644
--- a/src/main/java/lwjake2/game/GameItems.java
+++ b/src/main/java/lwjake2/game/GameItems.java
@@ -244,7 +244,7 @@ public class GameItems {
             if (!taken)
                 return;
             
-            Com.dprintln("Picked up:" + ent.classname);
+            log.debug("Picked up:{}", ent.classname);
     
             if (!((GameBase.coop.value != 0) && (ent.item.flags & Defines.IT_STAY_COOP) != 0)
                     || 0 != (ent.spawnflags & (Defines.DROPPED_ITEM | Defines.DROPPED_PLAYER_ITEM))) {
diff --git a/src/main/java/lwjake2/game/GameSpawn.java b/src/main/java/lwjake2/game/GameSpawn.java
index 468bec6..782b8f4 100644
--- a/src/main/java/lwjake2/game/GameSpawn.java
+++ b/src/main/java/lwjake2/game/GameSpawn.java
@@ -467,7 +467,7 @@ public class GameSpawn {
     public static void SpawnEntities(String mapname, String entities,
             String spawnpoint) {
         
-        Com.dprintln("SpawnEntities(), mapname=" + mapname);
+        log.debug("SpawnEntities(), mapname={}", mapname);
         edict_t ent;
         int inhibit;
         String com_token;
diff --git a/src/main/java/lwjake2/game/edict_t.java b/src/main/java/lwjake2/game/edict_t.java
index 7d450f7..83d808a 100644
--- a/src/main/java/lwjake2/game/edict_t.java
+++ b/src/main/java/lwjake2/game/edict_t.java
@@ -346,7 +346,7 @@ public class edict_t {
 
         if (key.equals("team")) {
             team = GameSpawn.ED_NewString(value);
-            Com.dprintln("Monster Team:" + team);
+            log.debug("Monster Team: {}", team);
             return true;
         } // F_LSTRING),
 
diff --git a/src/main/java/lwjake2/qcommon/CM.java b/src/main/java/lwjake2/qcommon/CM.java
index ddf4c09..eb8afec 100644
--- a/src/main/java/lwjake2/qcommon/CM.java
+++ b/src/main/java/lwjake2/qcommon/CM.java
@@ -779,9 +779,9 @@ public class CM {
         for (; x < l.filelen && cmod_base[x + l.fileofs] != 0; x++);
 
         map_entitystring = new String(cmod_base, l.fileofs, x).trim();
-        Com.dprintln("entitystring=" + map_entitystring.length() + 
-                " bytes, [" + map_entitystring.substring(0, Math.min (
-                        map_entitystring.length(), 15)) + "...]" );
+        log.debug("entitystring={} bytes, [{}...]",
+                  map_entitystring.length(),
+                  map_entitystring.substring(0, Math.min (map_entitystring.length(), 15)));
     }
 
     /** Returns the model with a given id "*" + <number> */
diff --git a/src/main/java/lwjake2/qcommon/Com.java b/src/main/java/lwjake2/qcommon/Com.java
index 310729c..05d8d3f 100644
--- a/src/main/java/lwjake2/qcommon/Com.java
+++ b/src/main/java/lwjake2/qcommon/Com.java
@@ -303,25 +303,11 @@ public final class Com {
         }
     }
 
-    public static void dprintln(String fmt)
-    {
-        DPrintf(_debugContext + fmt + "\n", null);
-    }
-
     public static void Printf(String fmt)
     {
         Printf(_debugContext + fmt, null);
     }
 
-    public static void DPrintf(String fmt, Vargs vargs)
-    {
-        if (Globals.developer == null || Globals.developer.value == 0)
-            return; // don't confuse non-developers with techie stuff...
-        _debugContext = debugContext;
-        Printf(fmt, vargs);
-        _debugContext="";
-    }
-
     /** Prints out messages, which can also be redirected to a remote client. */
     public static void Printf(String fmt, Vargs vargs)
     {
diff --git a/src/main/java/lwjake2/qcommon/MSG.java b/src/main/java/lwjake2/qcommon/MSG.java
index 969a6cb..a4fc6d4 100644
--- a/src/main/java/lwjake2/qcommon/MSG.java
+++ b/src/main/java/lwjake2/qcommon/MSG.java
@@ -18,12 +18,14 @@
 
 package lwjake2.qcommon;
 
+import lombok.extern.slf4j.Slf4j;
 import lwjake2.Globals;
 import lwjake2.game.entity_state_t;
 import lwjake2.game.usercmd_t;
 import lwjake2.util.Lib;
 import lwjake2.util.Math3D;
 
+@Slf4j
 public class MSG extends Globals {
 
     //
@@ -493,7 +495,7 @@ public class MSG extends Globals {
         } while (l < 2047);
         
         String ret = new String(readbuf, 0, l).trim();
-        Com.dprintln("MSG.ReadStringLine:[" + ret.replace('\0', '@') + "]");
+        log.debug("MSG.ReadStringLine:[{}]", ret.replace('\0', '@'));
         return ret;
     }
 
diff --git a/src/main/java/lwjake2/qcommon/SZ.java b/src/main/java/lwjake2/qcommon/SZ.java
index 6a00558..bf3c0fa 100644
--- a/src/main/java/lwjake2/qcommon/SZ.java
+++ b/src/main/java/lwjake2/qcommon/SZ.java
@@ -18,12 +18,14 @@
 
 package lwjake2.qcommon;
 
+import lombok.extern.slf4j.Slf4j;
 import lwjake2.Defines;
 import lwjake2.util.Lib;
 
 /**
  * SZ
  */
+@Slf4j
 public final class SZ {
 
     public static void Clear(sizebuf_t buf) {
@@ -82,7 +84,7 @@ public final class SZ {
 
     // 
     public static void Print(sizebuf_t buf, String data) {
-        Com.dprintln("SZ.print():<" + data + ">" );
+        log.debug("SZ.print():<{}>", data);
         int length = data.length();
         byte str[] = Lib.stringToBytes(data);
     
diff --git a/src/main/java/lwjake2/server/SV_USER.java b/src/main/java/lwjake2/server/SV_USER.java
index 6ddaca6..f695471 100644
--- a/src/main/java/lwjake2/server/SV_USER.java
+++ b/src/main/java/lwjake2/server/SV_USER.java
@@ -476,7 +476,7 @@ public class SV_USER {
      */
     public static void SV_ExecuteUserCommand(String s) {
         
-        Com.dprintln("SV_ExecuteUserCommand:" + s );
+        log.debug("SV_ExecuteUserCommand:{}", s);
         SV_USER.ucmd_t u = null;
 
         Cmd.TokenizeString(s.toCharArray(), true);