diff --git a/source/games/exhumed/src/anubis.cpp b/source/games/exhumed/src/anubis.cpp
index 0bcfd832d..65b0fec64 100644
--- a/source/games/exhumed/src/anubis.cpp
+++ b/source/games/exhumed/src/anubis.cpp
@@ -120,7 +120,7 @@ void AIAnubis::Tick(RunListEvent* ev)
 {
     const auto ap = ev->pObjActor;
     const int nAction = ap->nAction;
-    const int nSeq = getSeqFromId(kSeqAnubis, AnubisSeq[nAction].a);
+    const int nSeq = getSeqFromId(kSeqAnubis, AnubisSeq[nAction].nSeqId);
     const int nFrame = getSeqFrame(nSeq, ap->nFrame);
     const int nFlag = getSeqFrameFlags(nFrame);
     bool bVal = false;
@@ -340,7 +340,7 @@ void AIAnubis::Draw(RunListEvent* ev)
     const auto ap = ev->pObjActor;
     if (!ap) return;
 
-    seq_PlotSequence(ev->nParam, getSeqFromId(kSeqAnubis, AnubisSeq[ap->nAction].a), ap->nFrame, AnubisSeq[ap->nAction].b);
+    seq_PlotSequence(ev->nParam, getSeqFromId(kSeqAnubis, AnubisSeq[ap->nAction].nSeqId), ap->nFrame, AnubisSeq[ap->nAction].nFlags);
 }
 
 void AIAnubis::RadialDamage(RunListEvent* ev)
diff --git a/source/games/exhumed/src/fish.cpp b/source/games/exhumed/src/fish.cpp
index 5443d6e08..4402aa521 100644
--- a/source/games/exhumed/src/fish.cpp
+++ b/source/games/exhumed/src/fish.cpp
@@ -179,7 +179,7 @@ void BuildFish(DExhumedActor* pActor, const DVector3& pos, sectortype* pSector,
     pActor->spr.pal = pActor->sector()->ceilingpal;
     pActor->spr.xoffset = 0;
     pActor->spr.yoffset = 0;
-    pActor->spr.picnum = seq_GetSeqPicnum(kSeqFish, FishSeq[0].a, 0);
+    pActor->spr.picnum = seq_GetSeqPicnum(kSeqFish, FishSeq[0].nSeqId, 0);
     pActor->vel.X = 0;
     pActor->vel.Y = 0;
     pActor->vel.Z = 0;
@@ -258,7 +258,7 @@ void AIFish::Draw(RunListEvent* ev)
     if (pActor == nullptr) return;
     int nAction = pActor->nAction;
 
-    seq_PlotSequence(ev->nParam, getSeqFromId(kSeqFish, FishSeq[nAction].a), pActor->nFrame, FishSeq[nAction].b);
+    seq_PlotSequence(ev->nParam, getSeqFromId(kSeqFish, FishSeq[nAction].nSeqId), pActor->nFrame, FishSeq[nAction].nFlags);
     ev->pTSprite->ownerActor = nullptr;
     return;
 }
@@ -362,7 +362,7 @@ void AIFish::Tick(RunListEvent* ev)
         Gravity(pActor);
     }
 
-    int nSeq = getSeqFromId(kSeqFish, FishSeq[nAction].a);
+    int nSeq = getSeqFromId(kSeqFish, FishSeq[nAction].nSeqId);
 
     pActor->spr.picnum = seq_GetSeqPicnum2(nSeq, pActor->nFrame);
 
diff --git a/source/games/exhumed/src/lavadude.cpp b/source/games/exhumed/src/lavadude.cpp
index 0e2b9f8ce..e84bda07f 100644
--- a/source/games/exhumed/src/lavadude.cpp
+++ b/source/games/exhumed/src/lavadude.cpp
@@ -119,7 +119,7 @@ void BuildLava(DExhumedActor* pActor, const DVector3& pos, sectortype* pSector,
 	pActor->clipdist = 31.75;
     pActor->spr.xoffset = 0;
     pActor->spr.yoffset = 0;
-    pActor->spr.picnum = seq_GetSeqPicnum(kSeqLavag, LavadudeSeq[3].a, 0);
+    pActor->spr.picnum = seq_GetSeqPicnum(kSeqLavag, LavadudeSeq[3].nSeqId, 0);
     pActor->vel.X = 0;
     pActor->vel.Y = 0;
     pActor->vel.Z = 0;
@@ -150,9 +150,9 @@ void AILavaDude::Draw(RunListEvent* ev)
     if (!pActor) return;
 
     int nAction = pActor->nAction;
-    int nSeq = getSeqFromId(kSeqLavag, LavadudeSeq[nAction].a);
+    int nSeq = getSeqFromId(kSeqLavag, LavadudeSeq[nAction].nSeqId);
 
-    seq_PlotSequence(ev->nParam, nSeq, pActor->nFrame, LavadudeSeq[nAction].b);
+    seq_PlotSequence(ev->nParam, nSeq, pActor->nFrame, LavadudeSeq[nAction].nFlags);
     ev->pTSprite->ownerActor = nullptr;
     return;
 }
@@ -213,7 +213,7 @@ void AILavaDude::Tick(RunListEvent* ev)
     if (!pActor) return;
 
     int nAction = pActor->nAction;
-    int nSeq = getSeqFromId(kSeqLavag, LavadudeSeq[nAction].a);
+    int nSeq = getSeqFromId(kSeqLavag, LavadudeSeq[nAction].nSeqId);
 
     pActor->spr.picnum = seq_GetSeqPicnum2(nSeq, pActor->nFrame);
     int var_38 = pActor->nFrame;
diff --git a/source/games/exhumed/src/lion.cpp b/source/games/exhumed/src/lion.cpp
index b6150b390..315023fcc 100644
--- a/source/games/exhumed/src/lion.cpp
+++ b/source/games/exhumed/src/lion.cpp
@@ -93,7 +93,7 @@ void AILion::Draw(RunListEvent* ev)
     if (!pActor) return;
     int nAction = pActor->nAction;
 
-    seq_PlotSequence(ev->nParam, getSeqFromId(kSeqLion, LionSeq[nAction].a), pActor->nFrame, LionSeq[nAction].b);
+    seq_PlotSequence(ev->nParam, getSeqFromId(kSeqLion, LionSeq[nAction].nSeqId), pActor->nFrame, LionSeq[nAction].nFlags);
 }
 
 void AILion::RadialDamage(RunListEvent* ev)
@@ -198,7 +198,7 @@ void AILion::Tick(RunListEvent* ev)
         Gravity(pActor);
     }
 
-    int nSeq = getSeqFromId(kSeqLion, LionSeq[nAction].a);
+    int nSeq = getSeqFromId(kSeqLion, LionSeq[nAction].nSeqId);
 
     pActor->spr.picnum = seq_GetSeqPicnum2(nSeq, pActor->nFrame);
 
diff --git a/source/games/exhumed/src/mummy.cpp b/source/games/exhumed/src/mummy.cpp
index 3eac08d4f..7e7de7494 100644
--- a/source/games/exhumed/src/mummy.cpp
+++ b/source/games/exhumed/src/mummy.cpp
@@ -139,7 +139,7 @@ void AIMummy::Tick(RunListEvent* ev)
 
     Gravity(pActor);
 
-    int nSeq = getSeqFromId(kSeqMummy, MummySeq[nAction].a);
+    int nSeq = getSeqFromId(kSeqMummy, MummySeq[nAction].nSeqId);
 
     pActor->spr.picnum = seq_GetSeqPicnum2(nSeq, pActor->nFrame);
 
@@ -419,7 +419,7 @@ void AIMummy::Draw(RunListEvent* ev)
     if (!pActor) return;
     int nAction = pActor->nAction;
 
-    seq_PlotSequence(ev->nParam, getSeqFromId(kSeqMummy, MummySeq[nAction].a), pActor->nFrame, MummySeq[nAction].b);
+    seq_PlotSequence(ev->nParam, getSeqFromId(kSeqMummy, MummySeq[nAction].nSeqId), pActor->nFrame, MummySeq[nAction].nFlags);
     return;
 }
 
diff --git a/source/games/exhumed/src/player.cpp b/source/games/exhumed/src/player.cpp
index 9d00968bc..3f24d0aa8 100644
--- a/source/games/exhumed/src/player.cpp
+++ b/source/games/exhumed/src/player.cpp
@@ -529,7 +529,7 @@ void AIPlayer::Draw(RunListEvent* ev)
     const auto pPlayer = &PlayerList[nPlayer];
     const auto nAction = pPlayer->nAction;
 
-    seq_PlotSequence(ev->nParam, getSeqFromId(pPlayer->nSeq, PlayerSeq[nAction].a), pPlayer->nSeqSize, PlayerSeq[nAction].b);
+    seq_PlotSequence(ev->nParam, getSeqFromId(pPlayer->nSeq, PlayerSeq[nAction].nSeqId), pPlayer->nSeqSize, PlayerSeq[nAction].nFlags);
 }
 
 //---------------------------------------------------------------------------
@@ -1912,7 +1912,7 @@ static bool doPlayerDeathRestart(Player* const pPlayer)
 static void doPlayerActionSequence(Player* const pPlayer)
 {
     const auto pPlayerActor = pPlayer->pActor;
-    const auto nSeq = getSeqFromId(pPlayer->nSeq, PlayerSeq[pPlayer->nAction].a);
+    const auto nSeq = getSeqFromId(pPlayer->nSeq, PlayerSeq[pPlayer->nAction].nSeqId);
 
     seq_MoveSequence(pPlayerActor, nSeq, pPlayer->nSeqSize);
     pPlayer->nSeqSize++;
@@ -2007,7 +2007,7 @@ void AIPlayer::Tick(RunListEvent* ev)
     const auto pPlayer = &PlayerList[nPlayer];
     const auto pPlayerActor = pPlayer->pActor;
 
-    pPlayerActor->spr.picnum = seq_GetSeqPicnum(pPlayer->nSeq, PlayerSeq[nHeightTemplate[pPlayer->nAction]].a, pPlayer->nSeqSize);
+    pPlayerActor->spr.picnum = seq_GetSeqPicnum(pPlayer->nSeq, PlayerSeq[nHeightTemplate[pPlayer->nAction]].nSeqId, pPlayer->nSeqSize);
     pPlayer->pDoppleSprite->spr.picnum = pPlayerActor->spr.picnum;
 
     doPlayerCounters(pPlayer);
diff --git a/source/games/exhumed/src/queen.cpp b/source/games/exhumed/src/queen.cpp
index d4359e4f2..1f967c777 100644
--- a/source/games/exhumed/src/queen.cpp
+++ b/source/games/exhumed/src/queen.cpp
@@ -542,7 +542,7 @@ void AIQueenEgg::Tick(RunListEvent* ev)
         Gravity(pActor);
     }
 
-    int nSeq = getSeqFromId(kSeqQueenEgg, EggSeq[nAction].a);
+    int nSeq = getSeqFromId(kSeqQueenEgg, EggSeq[nAction].nSeqId);
 
     pActor->spr.picnum = seq_GetSeqPicnum2(nSeq, pEgg->nFrame);
 
@@ -725,7 +725,7 @@ void AIQueenEgg::Draw(RunListEvent* ev)
 {
     int nEgg = RunData[ev->nRun].nObjIndex;
     Egg* pEgg = &QueenEgg[nEgg];
-    seq_PlotSequence(ev->nParam, getSeqFromId(kSeqQueenEgg, EggSeq[pEgg->nAction].a), pEgg->nFrame, EggSeq[pEgg->nAction].b);
+    seq_PlotSequence(ev->nParam, getSeqFromId(kSeqQueenEgg, EggSeq[pEgg->nAction].nSeqId), pEgg->nFrame, EggSeq[pEgg->nAction].nFlags);
 }
 
 //---------------------------------------------------------------------------
@@ -798,7 +798,7 @@ void AIQueenHead::Tick(RunListEvent* ev)
         Gravity(pActor);
     }
 
-    int nSeq = getSeqFromId(kSeqQueen, HeadSeq[QueenHead.nAction].a);
+    int nSeq = getSeqFromId(kSeqQueen, HeadSeq[QueenHead.nAction].nSeqId);
 
     seq_MoveSequence(pActor, nSeq, QueenHead.nFrame);
 
@@ -1135,8 +1135,8 @@ void AIQueenHead::Draw(RunListEvent* ev)
 
     if (nHead == 0)
     {
-        edx = HeadSeq[nAction].b;
-        nSeq += HeadSeq[nAction].a;
+        edx = HeadSeq[nAction].nFlags;
+        nSeq += HeadSeq[nAction].nSeqId;
     }
     else
     {
@@ -1239,7 +1239,7 @@ void AIQueen::Tick(RunListEvent* ev)
         Gravity(pActor);
     }
 
-    int nSeq = getSeqFromId(kSeqQueen, QueenSeq[nAction].a);
+    int nSeq = getSeqFromId(kSeqQueen, QueenSeq[nAction].nSeqId);
 
     pActor->spr.picnum = seq_GetSeqPicnum2(nSeq, QueenList[nQueen].nFrame);
 
@@ -1572,7 +1572,7 @@ void AIQueen::Draw(RunListEvent* ev)
     int nQueen = RunData[ev->nRun].nObjIndex;
     assert(nQueen >= 0 && nQueen < kMaxQueens);
     int nAction = QueenList[nQueen].nAction;
-    seq_PlotSequence(ev->nParam, getSeqFromId(kSeqQueen, QueenSeq[nAction].a), QueenList[nQueen].nFrame, QueenSeq[nAction].b);
+    seq_PlotSequence(ev->nParam, getSeqFromId(kSeqQueen, QueenSeq[nAction].nSeqId), QueenList[nQueen].nFrame, QueenSeq[nAction].nFlags);
 }
 
 END_PS_NS
diff --git a/source/games/exhumed/src/ra.cpp b/source/games/exhumed/src/ra.cpp
index e1d716f86..688841941 100644
--- a/source/games/exhumed/src/ra.cpp
+++ b/source/games/exhumed/src/ra.cpp
@@ -209,7 +209,7 @@ void AIRa::Tick(RunListEvent* ev)
     int nPlayer = RunData[ev->nRun].nObjIndex;
     int nCurrentWeapon = PlayerList[nPlayer].nCurrentWeapon;
 
-    int nSeq = getSeqFromId(kSeqEyeHit, RaSeq[Ra[nPlayer].nAction].a);
+    int nSeq = getSeqFromId(kSeqEyeHit, RaSeq[Ra[nPlayer].nAction].nSeqId);
     DExhumedActor* pActor = Ra[nPlayer].pActor;
     if (!pActor) return;
 
@@ -336,7 +336,7 @@ void AIRa::Tick(RunListEvent* ev)
 void AIRa::Draw(RunListEvent* ev)
 {
     int nPlayer = RunData[ev->nRun].nObjIndex;
-    int nSeq = getSeqFromId(kSeqEyeHit, RaSeq[Ra[nPlayer].nAction].a);
+    int nSeq = getSeqFromId(kSeqEyeHit, RaSeq[Ra[nPlayer].nAction].nSeqId);
 
     seq_PlotSequence(ev->nParam, nSeq, Ra[nPlayer].nFrame, 1);
     ev->pTSprite->ownerActor = nullptr;
diff --git a/source/games/exhumed/src/rat.cpp b/source/games/exhumed/src/rat.cpp
index 9ce509903..f7c49d8a7 100644
--- a/source/games/exhumed/src/rat.cpp
+++ b/source/games/exhumed/src/rat.cpp
@@ -224,7 +224,7 @@ void AIRat::Draw(RunListEvent* ev)
     if (!pActor) return;
     int nAction = pActor->nAction;
 
-    seq_PlotSequence(ev->nParam, getSeqFromId(kSeqRat, RatSeq[nAction].a), pActor->nFrame, RatSeq[nAction].b);
+    seq_PlotSequence(ev->nParam, getSeqFromId(kSeqRat, RatSeq[nAction].nSeqId), pActor->nFrame, RatSeq[nAction].nFlags);
 }
 
 
@@ -244,7 +244,7 @@ void AIRat::Tick(RunListEvent* ev)
 
     bool bVal = false;
 
-    int nSeq = getSeqFromId(kSeqRat, RatSeq[nAction].a);
+    int nSeq = getSeqFromId(kSeqRat, RatSeq[nAction].nSeqId);
     pActor->spr.picnum = seq_GetSeqPicnum2(nSeq, pActor->nFrame);
 
     seq_MoveSequence(pActor, nSeq, pActor->nFrame);
diff --git a/source/games/exhumed/src/rex.cpp b/source/games/exhumed/src/rex.cpp
index c6ddb1981..25a743483 100644
--- a/source/games/exhumed/src/rex.cpp
+++ b/source/games/exhumed/src/rex.cpp
@@ -171,7 +171,7 @@ void AIRex::Draw(RunListEvent* ev)
 
     int nAction = pActor->nAction;
 
-    seq_PlotSequence(ev->nParam, getSeqFromId(kSeqRex, RexSeq[nAction].a), pActor->nFrame, RexSeq[nAction].b);
+    seq_PlotSequence(ev->nParam, getSeqFromId(kSeqRex, RexSeq[nAction].nSeqId), pActor->nFrame, RexSeq[nAction].nFlags);
     return;
 }
 
@@ -192,7 +192,7 @@ void AIRex::Tick(RunListEvent* ev)
 
     Gravity(pActor);
 
-    int nSeq = getSeqFromId(kSeqRex, RexSeq[nAction].a);
+    int nSeq = getSeqFromId(kSeqRex, RexSeq[nAction].nSeqId);
 
     pActor->spr.picnum = seq_GetSeqPicnum2(nSeq, pActor->nFrame);
 
diff --git a/source/games/exhumed/src/roach.cpp b/source/games/exhumed/src/roach.cpp
index 74ee3f188..508d6c789 100644
--- a/source/games/exhumed/src/roach.cpp
+++ b/source/games/exhumed/src/roach.cpp
@@ -110,7 +110,7 @@ void AIRoach::Draw(RunListEvent* ev)
 	if (!pActor) return;
     int nAction = pActor->nAction;
 
-    seq_PlotSequence(ev->nParam, getSeqFromId(kSeqRoach, RoachSeq[nAction].a), pActor->nFrame, RoachSeq[nAction].b);
+    seq_PlotSequence(ev->nParam, getSeqFromId(kSeqRoach, RoachSeq[nAction].nSeqId), pActor->nFrame, RoachSeq[nAction].nFlags);
     return;
 }
 
@@ -211,7 +211,7 @@ void AIRoach::Tick(RunListEvent* ev)
 
     Gravity(pActor);
 
-    int nSeq = getSeqFromId(kSeqRoach, RoachSeq[nAction].a);
+    int nSeq = getSeqFromId(kSeqRoach, RoachSeq[nAction].nSeqId);
 
     pActor->spr.picnum = seq_GetSeqPicnum2(nSeq, pActor->nFrame);
     seq_MoveSequence(pActor, nSeq, pActor->nFrame);
diff --git a/source/games/exhumed/src/scorp.cpp b/source/games/exhumed/src/scorp.cpp
index 6e14ae909..a80337414 100644
--- a/source/games/exhumed/src/scorp.cpp
+++ b/source/games/exhumed/src/scorp.cpp
@@ -105,7 +105,7 @@ void AIScorp::Draw(RunListEvent* ev)
 
     int nAction = pActor->nAction;
 
-    seq_PlotSequence(ev->nParam, getSeqFromId(kSeqScorp, ScorpSeq[nAction].a), pActor->nFrame, ScorpSeq[nAction].b);
+    seq_PlotSequence(ev->nParam, getSeqFromId(kSeqScorp, ScorpSeq[nAction].nSeqId), pActor->nFrame, ScorpSeq[nAction].nFlags);
 }
 
 //---------------------------------------------------------------------------
@@ -206,7 +206,7 @@ void AIScorp::Tick(RunListEvent* ev)
         Gravity(pActor);
     }
 
-    int nSeq = getSeqFromId(kSeqScorp, ScorpSeq[nAction].a);
+    int nSeq = getSeqFromId(kSeqScorp, ScorpSeq[nAction].nSeqId);
 
     pActor->spr.picnum = seq_GetSeqPicnum2(nSeq, pActor->nFrame);
     seq_MoveSequence(pActor, nSeq, pActor->nFrame);
diff --git a/source/games/exhumed/src/sequence.h b/source/games/exhumed/src/sequence.h
index d60f9c020..20bf8e8fd 100644
--- a/source/games/exhumed/src/sequence.h
+++ b/source/games/exhumed/src/sequence.h
@@ -104,8 +104,8 @@ enum {
 
 struct actionSeq
 {
-    int16_t a;
-    int16_t b;
+    int16_t nSeqId;
+    int16_t nFlags;
 };
 
 struct SeqFrameChunk
diff --git a/source/games/exhumed/src/set.cpp b/source/games/exhumed/src/set.cpp
index 0aa3b189a..a82ddcbf7 100644
--- a/source/games/exhumed/src/set.cpp
+++ b/source/games/exhumed/src/set.cpp
@@ -248,7 +248,7 @@ void AISet::Draw(RunListEvent* ev)
 	if (!pActor) return;
     int nAction = pActor->nAction;
 
-    seq_PlotSequence(ev->nParam, getSeqFromId(kSeqSet, SetSeq[nAction].a), pActor->nFrame, SetSeq[nAction].b);
+    seq_PlotSequence(ev->nParam, getSeqFromId(kSeqSet, SetSeq[nAction].nSeqId), pActor->nFrame, SetSeq[nAction].nFlags);
     return;
 }
 
@@ -269,7 +269,7 @@ void AISet::Tick(RunListEvent* ev)
 
     Gravity(pActor);
 
-    int nSeq = getSeqFromId(kSeqSet, SetSeq[nAction].a);
+    int nSeq = getSeqFromId(kSeqSet, SetSeq[nAction].nSeqId);
     pActor->spr.picnum = seq_GetSeqPicnum2(nSeq, pActor->nFrame);
     seq_MoveSequence(pActor, nSeq, pActor->nFrame);
 
diff --git a/source/games/exhumed/src/spider.cpp b/source/games/exhumed/src/spider.cpp
index 61d6dd8a4..37722af5c 100644
--- a/source/games/exhumed/src/spider.cpp
+++ b/source/games/exhumed/src/spider.cpp
@@ -117,7 +117,7 @@ void AISpider::Tick(RunListEvent* ev)
         }
     }
 
-    int nSeq = getSeqFromId(kSeqSpider, SpiderSeq[nAction].a);
+    int nSeq = getSeqFromId(kSeqSpider, SpiderSeq[nAction].nSeqId);
 
     spp->spr.picnum = seq_GetSeqPicnum2(nSeq, spp->nFrame);
 
@@ -354,7 +354,7 @@ void AISpider::Draw(RunListEvent* ev)
 
     int nAction = spp->nAction;
 
-    seq_PlotSequence(ev->nParam, getSeqFromId(kSeqSpider, SpiderSeq[nAction].a), spp->nFrame, SpiderSeq[nAction].b);
+    seq_PlotSequence(ev->nParam, getSeqFromId(kSeqSpider, SpiderSeq[nAction].nSeqId), spp->nFrame, SpiderSeq[nAction].nFlags);
 }
 
 //---------------------------------------------------------------------------
diff --git a/source/games/exhumed/src/wasp.cpp b/source/games/exhumed/src/wasp.cpp
index ce57114f1..abf049731 100644
--- a/source/games/exhumed/src/wasp.cpp
+++ b/source/games/exhumed/src/wasp.cpp
@@ -122,7 +122,7 @@ void AIWasp::Draw(RunListEvent* ev)
     if (!pActor) return;
     int nAction = pActor->nAction;
 
-    seq_PlotSequence(ev->nParam, getSeqFromId(kSeqWasp, WaspSeq[nAction].a), pActor->nFrame, WaspSeq[nAction].b);
+    seq_PlotSequence(ev->nParam, getSeqFromId(kSeqWasp, WaspSeq[nAction].nSeqId), pActor->nFrame, WaspSeq[nAction].nFlags);
     return;
 }
 
@@ -214,7 +214,7 @@ void AIWasp::Tick(RunListEvent* ev)
 
     bool bVal = false;
 
-    int nSeq = getSeqFromId(kSeqWasp, WaspSeq[nAction].a);
+    int nSeq = getSeqFromId(kSeqWasp, WaspSeq[nAction].nSeqId);
 
     pActor->spr.picnum = seq_GetSeqPicnum2(nSeq, pActor->nFrame);