diff --git a/src/g_levellocals.h b/src/g_levellocals.h
index 9bf1386352..20542b9664 100644
--- a/src/g_levellocals.h
+++ b/src/g_levellocals.h
@@ -509,27 +509,27 @@ inline FSectorPortal *line_t::GetTransferredPortal()
 
 inline FSectorPortal *sector_t::GetPortal(int plane)
 {
-	return &level.sectorPortals[Portals[plane]];
+	return &Level->sectorPortals[Portals[plane]];
 }
 
 inline double sector_t::GetPortalPlaneZ(int plane)
 {
-	return level.sectorPortals[Portals[plane]].mPlaneZ;
+	return Level->sectorPortals[Portals[plane]].mPlaneZ;
 }
 
 inline DVector2 sector_t::GetPortalDisplacement(int plane)
 {
-	return level.sectorPortals[Portals[plane]].mDisplacement;
+	return Level->sectorPortals[Portals[plane]].mDisplacement;
 }
 
 inline int sector_t::GetPortalType(int plane)
 {
-	return level.sectorPortals[Portals[plane]].mType;
+	return Level->sectorPortals[Portals[plane]].mType;
 }
 
 inline int sector_t::GetOppositePortalGroup(int plane)
 {
-	return level.sectorPortals[Portals[plane]].mDestination->PortalGroup;
+	return Level->sectorPortals[Portals[plane]].mDestination->PortalGroup;
 }
 
 inline bool sector_t::PortalBlocksView(int plane)
diff --git a/src/p_3dmidtex.cpp b/src/p_3dmidtex.cpp
index 81fb56c0eb..64485522c8 100644
--- a/src/p_3dmidtex.cpp
+++ b/src/p_3dmidtex.cpp
@@ -119,15 +119,16 @@ void P_Attach3dMidtexLinesToSector(sector_t *sector, int lineid, int tag, bool c
 		// invalid set of parameters
 		return;
 	}
+	auto Level = sector->Level;
 
 	extsector_t::midtex::plane &scrollplane = ceiling? sector->e->Midtex.Ceiling : sector->e->Midtex.Floor;
 
 	// Bit arrays that mark whether a line or sector is to be attached.
-	uint8_t *found_lines = new uint8_t[(level.lines.Size()+7)/8];
-	uint8_t *found_sectors = new uint8_t[(level.sectors.Size()+7)/8];
+	uint8_t *found_lines = new uint8_t[(Level->lines.Size()+7)/8];
+	uint8_t *found_sectors = new uint8_t[(Level->sectors.Size()+7)/8];
 
-	memset(found_lines, 0, sizeof (uint8_t) * ((level.lines.Size()+7)/8));
-	memset(found_sectors, 0, sizeof (uint8_t) * ((level.sectors.Size()+7)/8));
+	memset(found_lines, 0, sizeof (uint8_t) * ((Level->lines.Size()+7)/8));
+	memset(found_sectors, 0, sizeof (uint8_t) * ((Level->sectors.Size()+7)/8));
 
 	// mark all lines and sectors that are already attached to this one
 	// and clear the arrays. The old data will be re-added automatically
@@ -149,11 +150,11 @@ void P_Attach3dMidtexLinesToSector(sector_t *sector, int lineid, int tag, bool c
 
 	if (tag == 0)
 	{
-		auto itr = level.GetLineIdIterator(lineid);
+		auto itr = Level->GetLineIdIterator(lineid);
 		int line;
 		while ((line = itr.Next()) >= 0)
 		{
-			line_t *ln = &level.lines[line];
+			line_t *ln = &Level->lines[line];
 
 			if (ln->frontsector == NULL || ln->backsector == NULL || !(ln->flags & ML_3DMIDTEX))
 			{
@@ -165,13 +166,13 @@ void P_Attach3dMidtexLinesToSector(sector_t *sector, int lineid, int tag, bool c
 	}
 	else
 	{
-		auto it = level.GetSectorTagIterator(tag);
+		auto it = Level->GetSectorTagIterator(tag);
 		int sec;
 		while ((sec = it.Next()) >= 0)
 		{
-			for (auto ln : level.sectors[sec].Lines)
+			for (auto ln : Level->sectors[sec].Lines)
 			{
-				if (lineid != 0 && !level.LineHasId(ln, lineid)) continue;
+				if (lineid != 0 && !Level->LineHasId(ln, lineid)) continue;
 
 				if (ln->frontsector == NULL || ln->backsector == NULL || !(ln->flags & ML_3DMIDTEX))
 				{
@@ -185,28 +186,28 @@ void P_Attach3dMidtexLinesToSector(sector_t *sector, int lineid, int tag, bool c
 	}
 
 
-	for(unsigned i=0; i < level.lines.Size(); i++)
+	for(unsigned i=0; i < Level->lines.Size(); i++)
 	{
 		if (found_lines[i>>3] & (1 << (i&7)))
 		{
-			auto &line = level.lines[i];
+			auto &line = Level->lines[i];
 			scrollplane.AttachedLines.Push(&line);
 
 			v = line.frontsector->Index();
-			assert(v < (int)level.sectors.Size());
+			assert(v < (int)Level->sectors.Size());
 			found_sectors[v>>3] |= 1 << (v&7);
 
 			v = line.backsector->Index();
-			assert(v < (int)level.sectors.Size());
+			assert(v < (int)Level->sectors.Size());
 			found_sectors[v>>3] |= 1 << (v&7);
 		}
 	}
 
-	for (unsigned i=0; i < level.sectors.Size(); i++)
+	for (unsigned i=0; i < Level->sectors.Size(); i++)
 	{
 		if (found_sectors[i>>3] & (1 << (i&7)))
 		{
-			scrollplane.AttachedSectors.Push(&level.sectors[i]);
+			scrollplane.AttachedSectors.Push(&Level->sectors[i]);
 		}
 	}
 
diff --git a/src/p_doors.cpp b/src/p_doors.cpp
index a0bc8af660..00b4f214e8 100644
--- a/src/p_doors.cpp
+++ b/src/p_doors.cpp
@@ -132,7 +132,7 @@ void DDoor::Tick ()
 		// killough 10/98: implement gradual lighting effects
 		if (m_LightTag != 0 && m_TopDist != -m_Sector->floorplane.fD())
 		{
-			level.EV_LightTurnOnPartway (m_LightTag, 
+			Level->EV_LightTurnOnPartway (m_LightTag, 
 				(m_Sector->ceilingplane.fD() + m_Sector->floorplane.fD()) / (m_TopDist + m_Sector->floorplane.fD()));
 		}
 
@@ -178,7 +178,7 @@ void DDoor::Tick ()
 		// killough 10/98: implement gradual lighting effects
 		if (m_LightTag != 0 && m_TopDist != -m_Sector->floorplane.fD())
 		{
-			level.EV_LightTurnOnPartway (m_LightTag,
+			Level->EV_LightTurnOnPartway (m_LightTag,
 				(m_Sector->ceilingplane.fD() + m_Sector->floorplane.fD()) / (m_TopDist + m_Sector->floorplane.fD()));
 		}
 
diff --git a/src/p_interaction.cpp b/src/p_interaction.cpp
index ec2854c6a9..a4916e5cfc 100644
--- a/src/p_interaction.cpp
+++ b/src/p_interaction.cpp
@@ -352,7 +352,7 @@ void AActor::Die (AActor *source, AActor *inflictor, int dmgflags, FName MeansOf
 	// [JM] Fire KILL type scripts for actor. Not needed for players, since they have the "DEATH" script type.
 	if (!player && !(flags7 & MF7_NOKILLSCRIPTS) && ((flags7 & MF7_USEKILLSCRIPTS) || gameinfo.forcekillscripts))
 	{
-		level.Behaviors.StartTypedScripts(SCRIPT_Kill, this, true, 0, true);
+		Level->Behaviors.StartTypedScripts(SCRIPT_Kill, this, true, 0, true);
 	}
 
 	flags &= ~(MF_SHOOTABLE|MF_FLOAT|MF_SKULLFLY);
@@ -387,7 +387,7 @@ void AActor::Die (AActor *source, AActor *inflictor, int dmgflags, FName MeansOf
 	}
 
 	if (CountsAsKill())
-		level.killed_monsters++;
+		Level->killed_monsters++;
 		
 	if (source && source->player)
 	{
@@ -399,7 +399,7 @@ void AActor::Die (AActor *source, AActor *inflictor, int dmgflags, FName MeansOf
 		// Don't count any frags at level start, because they're just telefrags
 		// resulting from insufficient deathmatch starts, and it wouldn't be
 		// fair to count them toward a player's score.
-		if (player && level.maptime)
+		if (player && Level->maptime)
 		{
 			source->player->frags[player - players]++;
 			if (player == source->player)	// [RH] Cumulative frag count
@@ -492,7 +492,7 @@ void AActor::Die (AActor *source, AActor *inflictor, int dmgflags, FName MeansOf
 				source->player->multicount++;
 				if (source->player->lastkilltime > 0)
 				{
-					if (source->player->lastkilltime < level.time - 3*TICRATE)
+					if (source->player->lastkilltime < Level->time - 3*TICRATE)
 					{
 						source->player->multicount = 1;
 					}
@@ -535,7 +535,7 @@ void AActor::Die (AActor *source, AActor *inflictor, int dmgflags, FName MeansOf
 						}
 					}
 				}
-				source->player->lastkilltime = level.time;
+				source->player->lastkilltime = Level->time;
 			}
 
 			// [RH] Implement fraglimit
@@ -563,10 +563,10 @@ void AActor::Die (AActor *source, AActor *inflictor, int dmgflags, FName MeansOf
 		E_PlayerDied(int(player - players));
 
 		// Death script execution, care of Skull Tag
-		level.Behaviors.StartTypedScripts (SCRIPT_Death, this, true);
+		Level->Behaviors.StartTypedScripts (SCRIPT_Death, this, true);
 
 		// [RH] Force a delay between death and respawn
-		player->respawn_time = level.time + TICRATE;
+		player->respawn_time = Level->time + TICRATE;
 
 		//Added by MC: Respawn bots
 		if (bglobal.botnum && !demoplayback)
@@ -617,8 +617,7 @@ void AActor::Die (AActor *source, AActor *inflictor, int dmgflags, FName MeansOf
 	}
 
 	// [RH] If this is the unmorphed version of another monster, destroy this
-	// actor, because the morphed version is the one that will stick around in
-	// the level.
+	// actor, because the morphed version is the one that will stick around.
 	if (flags & MF_UNMORPHED)
 	{
 		Destroy ();
@@ -1247,7 +1246,7 @@ static int DamageMobj (AActor *target, AActor *inflictor, AActor *source, int da
 		//Use the original damage to check for telefrag amount. Don't let the now-amplified damagetypes do it.
 		if (!telefragDamage || (target->flags7 & MF7_LAXTELEFRAGDMG))
 		{ // Still allow telefragging :-(
-			damage = (int)(damage * level.teamdamage);
+			damage = (int)(damage * target->Level->teamdamage);
 			if (damage <= 0)
 			{
 				return (damage < 0) ? -1 : 0;
@@ -1681,7 +1680,7 @@ bool P_PoisonPlayer (player_t *player, AActor *poisoner, AActor *source, int poi
 	}
 	if (source != NULL && source->player != player && player->mo->IsTeammate (source))
 	{
-		poison = (int)(poison * level.teamdamage);
+		poison = (int)(poison * player->mo->Level->teamdamage);
 	}
 	if (poison > 0)
 	{
@@ -1802,7 +1801,7 @@ void P_PoisonDamage (player_t *player, AActor *source, int damage, bool playPain
 			return;
 		}
 	}
-	if (!(level.time&63) && playPainSound)
+	if (!(target->Level->time&63) && playPainSound)
 	{
 		FState *painstate = target->FindState(NAME_Pain, player->poisonpaintype);
 		if (painstate != NULL)
diff --git a/src/p_linkedsectors.cpp b/src/p_linkedsectors.cpp
index f50c68b604..5d327643e8 100644
--- a/src/p_linkedsectors.cpp
+++ b/src/p_linkedsectors.cpp
@@ -288,7 +288,8 @@ static void RemoveTaggedSectors(extsector_t::linked::plane &scrollplane, int tag
 {
 	for(int i = scrollplane.Sectors.Size()-1; i>=0; i--)
 	{
-		if (level.SectorHasTag(scrollplane.Sectors[i].Sector, tag))
+		auto sec = scrollplane.Sectors[i].Sector;
+		if (sec->Level->SectorHasTag(sec, tag))
 		{
 			scrollplane.Sectors.Delete(i);
 		}
@@ -313,6 +314,7 @@ bool P_AddSectorLinks(sector_t *control, int tag, INTBOOL ceiling, int movetype)
 	if ((ceiling && control->PlaneMoving(sector_t::ceiling)) || 
 		(!ceiling && control->PlaneMoving(sector_t::floor))) return false;
 
+	auto Level = control->Level;
 	// Make sure we have only valid combinations
 	movetype &= LINK_FLAGMASK;
 	if ((movetype & LINK_FLOORMIRROR) == LINK_FLOORMIRRORFLAG) movetype &= ~LINK_FLOORMIRRORFLAG;
@@ -327,16 +329,16 @@ bool P_AddSectorLinks(sector_t *control, int tag, INTBOOL ceiling, int movetype)
 	if (movetype > 0)
 	{
 		int sec;
-		auto itr = level.GetSectorTagIterator(tag);
+		auto itr = Level->GetSectorTagIterator(tag);
 		while ((sec = itr.Next()) >= 0)
 		{
 			// Don't attach to self (but allow attaching to this sector's oposite plane.
-			if (control == &level.sectors[sec])
+			if (control == &Level->sectors[sec])
 			{
 				if (ceiling == sector_t::floor && movetype & LINK_FLOOR) continue;
 				if (ceiling == sector_t::ceiling && movetype & LINK_CEILING) continue;
 			}
-			AddSingleSector(scrollplane, &level.sectors[sec], movetype);
+			AddSingleSector(scrollplane, &Level->sectors[sec], movetype);
 		}
 	}
 	else
@@ -360,11 +362,11 @@ void P_AddSectorLinksByID(sector_t *control, int id, INTBOOL ceiling)
 {
 	extsector_t::linked::plane &scrollplane = ceiling? control->e->Linked.Ceiling : control->e->Linked.Floor;
 
-	auto itr = level.GetLineIdIterator(id);
+	auto itr = control->Level->GetLineIdIterator(id);
 	int line;
 	while ((line = itr.Next()) >= 0)
 	{
-		line_t *ld = &level.lines[line];
+		line_t *ld = &control->Level->lines[line];
 
 		if (ld->special == Static_Init && ld->args[1] == Init_SectorLink)
 		{
diff --git a/src/p_sight.cpp b/src/p_sight.cpp
index fd85a9a080..41ecd23e8f 100644
--- a/src/p_sight.cpp
+++ b/src/p_sight.cpp
@@ -857,7 +857,7 @@ int P_CheckSight (AActor *t1, AActor *t2, int flags)
 	//
 	// check for trivial rejection
 	//
-	if (!level.CheckReject(s1, s2))
+	if (!t1->Level->CheckReject(s1, s2))
 	{
 sightcounts[0]++;
 		res = false;			// can't possibly be connected
diff --git a/src/p_spec.cpp b/src/p_spec.cpp
index 0c81a2de0b..f60e614683 100644
--- a/src/p_spec.cpp
+++ b/src/p_spec.cpp
@@ -164,6 +164,8 @@ bool P_ActivateLine (line_t *line, AActor *mo, int side, int activationType, DVe
 		return false;
 	}
 
+	auto Level = line->GetLevel();
+
 	// [MK] Use WorldLinePreActivated to decide if activation should continue
 	bool shouldactivate = true;
 	E_WorldLinePreActivated(line, mo, activationType, &shouldactivate);
@@ -198,13 +200,13 @@ bool P_ActivateLine (line_t *line, AActor *mo, int side, int activationType, DVe
 	}
 	// some old WADs use this method to create walls that change the texture when shot.
 	else if (activationType == SPAC_Impact &&					// only for shootable triggers
-		(level.flags2 & LEVEL2_DUMMYSWITCHES) &&				// this is only a compatibility setting for an old hack!
+		(Level->flags2 & LEVEL2_DUMMYSWITCHES) &&				// this is only a compatibility setting for an old hack!
 		!repeat &&												// only non-repeatable triggers
 		(special<Generic_Floor || special>Generic_Crusher) &&	// not for Boom's generalized linedefs
 		special &&												// not for lines without a special
-		level.LineHasId(line, line->args[0]) &&							// Safety check: exclude edited UDMF linedefs or ones that don't map the tag to args[0]
+		Level->LineHasId(line, line->args[0]) &&							// Safety check: exclude edited UDMF linedefs or ones that don't map the tag to args[0]
 		line->args[0] &&										// only if there's a tag (which is stored in the first arg)
-		level.FindFirstSectorFromTag (line->args[0]) == -1)			// only if no sector is tagged to this linedef
+		Level->FindFirstSectorFromTag (line->args[0]) == -1)			// only if no sector is tagged to this linedef
 	{
 		P_ChangeSwitchTexture (line->sidedef[0], repeat, special);
 		line->special = 0;
diff --git a/src/p_switch.cpp b/src/p_switch.cpp
index ac58e8cc0f..667ff1e3ef 100644
--- a/src/p_switch.cpp
+++ b/src/p_switch.cpp
@@ -97,7 +97,7 @@ static bool P_StartButton (side_t *side, int Where, FSwitchDef *Switch, const DV
 		}
 	}
 
-	level.CreateThinker<DActiveButton> (side, Where, Switch, pos, useagain);
+	side->sector->Level->CreateThinker<DActiveButton> (side, Where, Switch, pos, useagain);
 	return true;
 }
 
diff --git a/src/swrenderer/things/r_visiblespritelist.cpp b/src/swrenderer/things/r_visiblespritelist.cpp
index 108fdb1c73..8c3935a4b0 100644
--- a/src/swrenderer/things/r_visiblespritelist.cpp
+++ b/src/swrenderer/things/r_visiblespritelist.cpp
@@ -118,7 +118,7 @@ namespace swrenderer
 		}
 		else
 		{
-			return FindSubsectorDepth(thread, worldPos, level.HeadNode());
+			return FindSubsectorDepth(thread, worldPos, Level->HeadNode());
 		}
 	}