diff --git a/src/d_player.h b/src/d_player.h
index 508fb89a8..6b7d4bad1 100644
--- a/src/d_player.h
+++ b/src/d_player.h
@@ -111,8 +111,9 @@ typedef enum
 	PF_SHRINKME			= 1<<25, // "Shrink me" cheat preference
 	PF_SHRINKACTIVE		= 1<<26, // "Shrink me" cheat is in effect. (Can't be disabled mid-race)
 
-	// up to 1<<30 is free
-	PF_SLIDING			= 1<<31,
+	// up to 1<<29 is free
+	PF_ATTACKDOWN		= 1<<30, // For lua compat, don't use!
+	PF_SLIDING			= 1<<31, // For lua compat, don't use!
 } pflags_t;
 
 typedef enum
diff --git a/src/k_kart.c b/src/k_kart.c
index 767dbdf13..c8e64874c 100644
--- a/src/k_kart.c
+++ b/src/k_kart.c
@@ -7644,7 +7644,7 @@ void K_KartResetPlayerColor(player_t *player)
 		}
 	}
 
-	if (player->invincibilitytimer) // You're gonna kiiiiill
+	if (player->invincibilitytimer || player->powers[pw_invulnerability]) // You're gonna kiiiiill
 	{
 		boolean skip = false;
 
diff --git a/src/lua_playerlib.c b/src/lua_playerlib.c
index d08d75fcc..44e96bbf0 100644
--- a/src/lua_playerlib.c
+++ b/src/lua_playerlib.c
@@ -908,6 +908,9 @@ static int player_get(lua_State *L)
 		if (lua_compatmode && (plr->carry & CR_SLIDING) == CR_SLIDING)
 			pflags |= PF_SLIDING;
 
+		if (lua_compatmode && (plr->oldcmd.buttons & BT_ATTACK))
+			pflags |= PF_ATTACKDOWN;
+
 		lua_pushinteger(L, pflags);
 		break;
 	}
@@ -1189,6 +1192,11 @@ static int player_set(lua_State *L)
 				plr->carry |= CR_SLIDING;
 			else
 				plr->carry &= ~CR_SLIDING;
+
+			if (pflags & PF_ATTACKDOWN)
+				plr->oldcmd.buttons |= BT_ATTACK;
+			else
+				plr->oldcmd.buttons &= ~BT_ATTACK;
 		}
 
 		plr->pflags = pflags;
diff --git a/src/p_setup.c b/src/p_setup.c
index 3ae806bf9..164a9c206 100644
--- a/src/p_setup.c
+++ b/src/p_setup.c
@@ -6081,20 +6081,21 @@ static void P_ConvertBinaryLinedefTypes(void)
 		case 433: //Enable/disable gravity flip
 			lines[i].args[0] = !!(lines[i].flags & ML_NOCLIMB);
 			break;
-		/*case 434: //Award power-up
+		case 434: //Award power-up
 			if (sides[lines[i].sidenum[0]].text)
 			{
 				lines[i].stringargs[0] = Z_Malloc(strlen(sides[lines[i].sidenum[0]].text) + 1, PU_LEVEL, NULL);
 				M_Memcpy(lines[i].stringargs[0], sides[lines[i].sidenum[0]].text, strlen(sides[lines[i].sidenum[0]].text) + 1);
 			}
+
 			if (lines[i].sidenum[1] != 0xffff && lines[i].flags & ML_BLOCKMONSTERS) // read power from back sidedef
 			{
 				lines[i].stringargs[1] = Z_Malloc(strlen(sides[lines[i].sidenum[1]].text) + 1, PU_LEVEL, NULL);
 				M_Memcpy(lines[i].stringargs[1], sides[lines[i].sidenum[1]].text, strlen(sides[lines[i].sidenum[1]].text) + 1);
 			}
 			else
-				P_WriteConstant((lines[i].flags & ML_NOCLIMB) ? -1 : (sides[lines[i].sidenum[0]].textureoffset >> FRACBITS), &lines[i].stringargs[1]);
-			break;*/
+				P_WriteConstant((lines[i].flags & ML_NOCLIMB) ? -1 : (sides[lines[i].sidenum[0]].textureoffset >> FRACBITS), &lines[i].stringargs[1], "Powers", i);
+			break;
 		case 435: //Change plane scroller direction
 			lines[i].args[0] = tag;
 			lines[i].args[1] = R_PointToDist2(lines[i].v2->x, lines[i].v2->y, lines[i].v1->x, lines[i].v1->y) >> FRACBITS;
diff --git a/src/p_spec.c b/src/p_spec.c
index e10aa73b0..71c1d4219 100644
--- a/src/p_spec.c
+++ b/src/p_spec.c
@@ -3208,6 +3208,18 @@ boolean P_ProcessSpecial(activator_t *activator, INT16 special, INT32 *args, cha
 				//bot->flags2 = (bot->flags2 & ~MF2_OBJECTFLIP) | (mo->flags2 & MF2_OBJECTFLIP);
 			break;
 
+		case 434: // Custom Power
+			if (mo && mo->player)
+			{
+				powertype_t power = line->stringargs[0] ? get_number(line->stringargs[0]) : 0;
+				INT32 value = line->stringargs[1] ? get_number(line->stringargs[1]) : 0;
+				if (value == -1) // 'Infinite'
+					value = UINT16_MAX;
+
+				mo->player->powers[power] = value;
+			}
+			break;
+
 		case 435: // Change scroller direction
 			{
 				scroll_t *scroller;
diff --git a/src/p_user.c b/src/p_user.c
index 5da942c8b..bca1c84f5 100644
--- a/src/p_user.c
+++ b/src/p_user.c
@@ -1683,11 +1683,11 @@ static void P_CheckQuicksand(player_t *player)
 //
 static void P_CheckInvincibilityTimer(player_t *player)
 {
-	if (!player->invincibilitytimer)
+	if (!player->powers[pw_invulnerability] && !player->invincibilitytimer)
 		return;
 
 	// Resume normal music stuff.
-	if (player->invincibilitytimer == 1)
+	if (player->invincibilitytimer == 1 || player->powers[pw_invulnerability] == 1)
 	{
 		//K_KartResetPlayerColor(player); -- this gets called every tic anyways
 		G_GhostAddColor((INT32) (player - players), GHC_NORMAL);
@@ -4078,7 +4078,7 @@ void P_PlayerThink(player_t *player)
 	P_CheckInvincibilityTimer(player); // Spawn Invincibility Sparkles
 	
 	// "Blur" a bit when you have speed shoes and are going fast enough
-	if ((player->driftboost || player->sneakertimer || player->startboost || player->ringboost) && !player->invincibilitytimer // SRB2kart
+	if ((player->powers[pw_super] || player->powers[pw_sneakers] || player->driftboost || player->sneakertimer || player->startboost || player->ringboost) && !player->invincibilitytimer // SRB2kart
 		&& (player->speed + abs(player->mo->momz)) > FixedMul(20*FRACUNIT,player->mo->scale))
 	{
 		UINT8 i;
@@ -4110,7 +4110,13 @@ void P_PlayerThink(player_t *player)
 	if (player->bumpertime)
 		player->bumpertime--;
 
-	// Strength counts up to diminish fade.
+	// Strength counts up to diminish fade
+	if (player->powers[pw_sneakers] && player->powers[pw_sneakers] < UINT16_MAX)
+		player->powers[pw_sneakers]--;
+
+	if (player->powers[pw_invulnerability] && player->powers[pw_invulnerability] < UINT16_MAX)
+		player->powers[pw_invulnerability]--;
+
 	if (player->flashing && player->flashing < UINT16_MAX &&
 		(player->spectator || player->flashing < K_GetKartFlashing(player)))
 		player->flashing--;