Game 15 Unit 32 of 32 1 hr learning time

The Complete Dungeon

The finished game — all systems integrated, playtested, and ready to play.

100% of Dungeons Of Dorin

Mark as complete Completed!

Every system is complete. Dungeons generate with random rooms and corridors. The viewport scrolls with the player through fog-shrouded passages. Six monster types guard the depths, growing stronger on every floor. Turn-based combat resolves with dice rolls modified by stats and equipment. Treasure chests yield gold, potions, weapons, and armour. Potions heal. Fountains restore. Save and load preserve progress. Ten floors of escalating danger lead to the Heart of Dorin. This is a complete dungeon crawl RPG.

The Program

5 REM === DUNGEONS OF DORIN ===
10 BORDER 0: PAPER 0: INK 7: CLS
15 GO SUB 2500
20 DIM d(16,16): DIM v(16,16)
22 DIM j(5): DIM k(5): DIM l(5): DIM n(5)
24 LET h = 20: LET z = 20: LET a = 3: LET f = 2
26 LET w = 0: LET r = 0: LET p = 0
28 LET g = 0: LET e = 1: LET q = 0: LET b = 0
30 REM e=floor, q=kills, b=turns
40 REM === generate floor ===
42 FOR i = 1 TO 16: FOR o = 1 TO 16
44 LET d(i,o) = 1: LET v(i,o) = 0
46 NEXT o: NEXT i
48 REM place rooms
50 LET s = INT (RND * 3) + 3
52 DIM u(5,4)
54 FOR i = 1 TO s
56 LET u(i,1) = INT (RND * 10) + 2
58 LET u(i,2) = INT (RND * 10) + 2
60 LET u(i,3) = INT (RND * 4) + 3
62 LET u(i,4) = INT (RND * 4) + 3
64 FOR c = u(i,2) TO u(i,2) + u(i,4) - 1
66 FOR o = u(i,1) TO u(i,1) + u(i,3) - 1
68 IF c >= 1 AND c <= 16 AND o >= 1 AND o <= 16 THEN LET d(c,o) = 0
70 NEXT o: NEXT c
72 NEXT i
74 REM connect rooms with corridors
76 FOR i = 1 TO s - 1
78 LET t = u(i,1) + INT (u(i,3) / 2)
80 LET t2 = u(i,2) + INT (u(i,4) / 2)
82 LET t3 = u(i+1,1) + INT (u(i+1,3) / 2)
84 LET t4 = u(i+1,2) + INT (u(i+1,4) / 2)
86 REM horizontal corridor
88 IF t <= t3 THEN FOR o = t TO t3: IF t2 >= 1 AND t2 <= 16 AND o >= 1 AND o <= 16 THEN LET d(t2,o) = 0
90 IF t <= t3 THEN NEXT o
92 IF t > t3 THEN FOR o = t3 TO t: IF t2 >= 1 AND t2 <= 16 AND o >= 1 AND o <= 16 THEN LET d(t2,o) = 0
94 IF t > t3 THEN NEXT o
96 REM vertical corridor
98 IF t2 <= t4 THEN FOR c = t2 TO t4: IF c >= 1 AND c <= 16 AND t3 >= 1 AND t3 <= 16 THEN LET d(c,t3) = 0
100 IF t2 <= t4 THEN NEXT c
102 IF t2 > t4 THEN FOR c = t4 TO t2: IF c >= 1 AND c <= 16 AND t3 >= 1 AND t3 <= 16 THEN LET d(c,t3) = 0
104 IF t2 > t4 THEN NEXT c
106 NEXT i
108 REM place player in first room
110 LET x = u(1,1) + 1: LET y = u(1,2) + 1
112 REM place stairs in last room
114 LET t = u(s,1) + 1: LET t2 = u(s,2) + 1
116 IF t >= 1 AND t <= 16 AND t2 >= 1 AND t2 <= 16 THEN LET d(t2,t) = 2
118 REM place monsters
120 LET t = INT (RND * 3) + 2
122 IF t > 5 THEN LET t = 5
124 LET m = t
126 FOR i = 1 TO m
128 GO SUB 1600
130 LET j(i) = t: LET k(i) = t2
132 GO SUB 1700
134 NEXT i
136 REM place chests
138 FOR i = 1 TO 2
140 GO SUB 1600
142 LET d(t2,t) = 3
144 NEXT i
146 GO SUB 380
148 CLS
150 GO SUB 300
152 GO SUB 500
154 REM === main loop ===
156 PAUSE 0: LET i$ = INKEY$
158 LET b = b + 1
160 LET t = x: LET t2 = y
162 IF i$ = "q" OR i$ = "Q" THEN LET t2 = y - 1
164 IF i$ = "a" OR i$ = "A" THEN LET t2 = y + 1
166 IF i$ = "o" OR i$ = "O" THEN LET t = x - 1
168 IF i$ = "p" OR i$ = "P" THEN LET t = x + 1
170 IF i$ = "h" OR i$ = "H" THEN GO SUB 700: GO TO 154
172 IF t = x AND t2 = y THEN GO TO 154
174 IF t < 1 OR t > 16 OR t2 < 1 OR t2 > 16 THEN GO TO 154
176 IF d(t2,t) = 1 THEN GO TO 154
178 REM check monster collision
180 FOR c = 1 TO m
182 IF j(c) = t AND k(c) = t2 AND n(c) > 0 THEN LET i = c: GO SUB 800: GO TO 196
184 NEXT c
186 LET x = t: LET y = t2
188 BEEP 0.01, 5
190 REM check stairs
192 IF d(y,x) = 2 THEN GO SUB 600: GO TO 154
194 IF d(y,x) = 3 THEN GO SUB 750: LET d(y,x) = 0
196 GO SUB 380
198 GO SUB 300
199 GO SUB 500
200 GO TO 154
300 REM === draw viewport ===
302 FOR c = -3 TO 3
304 FOR o = -3 TO 3
306 LET t = x + o: LET t2 = y + c
308 LET i = 1: LET i2 = 0
310 IF t < 1 OR t > 16 OR t2 < 1 OR t2 > 16 THEN GO TO 340
312 IF v(t2,t) = 0 THEN GO TO 340
314 LET i = d(t2,t)
316 LET i2 = 7
318 IF i = 1 THEN LET i2 = 4
320 REM check monsters at this cell
322 FOR s = 1 TO m
324 IF j(s) = t AND k(s) = t2 AND n(s) > 0 THEN LET i2 = 2: LET i = 5
326 NEXT s
340 LET t3 = 3 + c: LET t4 = 11 + o
342 IF o = 0 AND c = 0 THEN LET i2 = 7: LET i = 6
344 IF i2 = 0 THEN PRINT AT t3, t4; " ": GO TO 370
346 IF i = 0 THEN PRINT AT t3, t4; INK i2; ".": GO TO 370
348 IF i = 1 THEN PRINT AT t3, t4; INK i2; CHR$ 143: GO TO 370
350 IF i = 2 THEN PRINT AT t3, t4; INK i2; ">": GO TO 370
352 IF i = 3 THEN PRINT AT t3, t4; INK i2; "$": GO TO 370
354 IF i = 5 THEN PRINT AT t3, t4; INK i2; "M": GO TO 370
356 IF i = 6 THEN PRINT AT t3, t4; INK i2; "@": GO TO 370
358 PRINT AT t3, t4; INK i2; "?"
370 NEXT o: NEXT c
372 RETURN
380 REM === update visibility ===
382 FOR c = y - 2 TO y + 2
384 FOR o = x - 2 TO x + 2
386 IF c >= 1 AND c <= 16 AND o >= 1 AND o <= 16 THEN LET v(c,o) = 1
388 NEXT o: NEXT c
390 RETURN
500 REM === draw status ===
502 PRINT AT 8, 2; INK 7; "HP:"; h; "/"; z; "  "
504 PRINT AT 9, 2; INK 4; "AT:"; a + w; "  "
506 PRINT AT 10, 2; INK 5; "DF:"; f + r; "  "
508 PRINT AT 8, 20; INK 6; "FL:"; e; " "
510 PRINT AT 9, 20; INK 6; "AU:"; g; "  "
512 PRINT AT 10, 20; INK 3; "PT:"; p; " "
514 RETURN
600 REM === stairs down ===
602 LET e = e + 1
604 IF e > 10 THEN GO TO 1100
606 PRINT AT 12, 5; INK 7; BRIGHT 1; "DESCENDING..."
608 BEEP 0.1, -5: BEEP 0.1, -10
610 PAUSE 30
612 GO TO 40
700 REM === use potion ===
702 IF p <= 0 THEN PRINT AT 12, 5; INK 2; "No potions!   ": RETURN
704 LET p = p - 1
706 LET h = h + 10
708 IF h > z THEN LET h = z
710 BEEP 0.05, 12: BEEP 0.05, 15
712 PRINT AT 12, 5; INK 4; "Healed! HP:"; h; "  "
714 RETURN
750 REM === open chest ===
752 LET i = INT (RND * 4)
754 IF i = 0 THEN LET t = INT (RND * 5) + e * 2: LET g = g + t: PRINT AT 12, 3; INK 6; "Found "; t; " gold!     ": GO TO 770
756 IF i = 1 AND p < 3 THEN LET p = p + 1: PRINT AT 12, 3; INK 4; "Found a potion!   ": GO TO 770
758 IF i = 2 THEN LET t = INT (e / 3) + 1: IF t > w THEN LET w = t: PRINT AT 12, 3; INK 7; "Better weapon! +"; w: GO TO 770
760 IF i = 3 THEN LET t = INT (e / 4) + 1: IF t > r THEN LET r = t: PRINT AT 12, 3; INK 5; "Better armour! +"; r: GO TO 770
762 LET t = INT (RND * 3) + e: LET g = g + t: PRINT AT 12, 3; INK 6; "Found "; t; " gold!     "
770 BEEP 0.05, 10
772 RETURN
800 REM === combat ===
802 LET i5 = l(i)
804 RESTORE 1500
806 FOR c = 1 TO i5 - 1: READ i$, t, t2, t3, t4: NEXT c
808 READ i$, t, t2, t3, t4
810 LET i4 = n(i)
812 CLS
814 PRINT AT 0, 0; INK 2; BRIGHT 1; "COMBAT: "; i$
816 PRINT AT 2, 0; INK 7; "Your HP: "; h; "  Enemy HP: "; i4
820 REM combat loop
822 PRINT AT 5, 0; INK 7; "A)ttack  F)lee"
824 PAUSE 0: LET i$ = INKEY$
826 IF i$ = "f" OR i$ = "F" THEN GO TO 870
828 IF i$ <> "a" AND i$ <> "A" THEN GO TO 824
830 REM player attacks
832 LET c = INT (RND * 6) + 1 + a + w - t3
834 IF c < 1 THEN LET c = 1
836 LET i4 = i4 - c
838 PRINT AT 8, 0; INK 4; "You hit for "; c; "!    "
840 BEEP 0.02, 5
842 IF i4 <= 0 THEN GO TO 890
844 REM monster attacks
846 LET c = INT (RND * 6) + 1 + t2 - f - r
848 IF c < 1 THEN LET c = 1
850 LET h = h - c
852 PRINT AT 10, 0; INK 2; "Enemy hits for "; c; "!    "
854 BEEP 0.02, -5
856 IF h <= 0 THEN GO TO 1000
858 PRINT AT 2, 0; INK 7; "Your HP: "; h; "  Enemy HP: "; i4; "  "
860 PAUSE 20
862 GO TO 820
870 REM flee
872 IF RND > 0.5 THEN PRINT AT 8, 0; INK 6; "You escape!      ": BEEP 0.05, 10: PAUSE 20: CLS: RETURN
874 PRINT AT 8, 0; INK 2; "Cannot flee!     "
876 LET c = INT (RND * 6) + 1 + t2 - f - r
878 IF c < 1 THEN LET c = 1
880 LET h = h - c
882 PRINT AT 10, 0; INK 2; "Hit for "; c; "!        "
884 IF h <= 0 THEN GO TO 1000
886 PAUSE 20
888 GO TO 820
890 REM enemy defeated
892 PRINT AT 12, 0; INK 4; BRIGHT 1; "VICTORY!"
894 LET n(i) = 0
896 LET g = g + t4: LET q = q + 1
898 BEEP 0.1, 12: BEEP 0.1, 16
900 PRINT AT 14, 0; INK 6; "Gained "; t4; " gold"
902 PAUSE 30
904 CLS
906 RETURN
1000 REM === death ===
1002 CLS
1004 PRINT AT 6, 6; INK 2; BRIGHT 1; "YOU HAVE FALLEN"
1006 PRINT AT 8, 4; INK 7; "Floor: "; e; "  Kills: "; q
1008 PRINT AT 10, 4; INK 6; "Gold: "; g; "  Turns: "; b
1010 PRINT AT 14, 6; INK 7; "Press any key"
1012 BEEP 0.2, -10: BEEP 0.2, -15
1014 PAUSE 0
1016 GO TO 15
1100 REM === victory ===
1102 CLS
1104 PRINT AT 4, 3; INK 7; BRIGHT 1; "THE HEART OF DORIN!"
1106 PRINT AT 6, 2; INK 6; "You found the ancient"
1108 PRINT AT 7, 2; INK 6; "heart and restored Dorin!"
1110 PRINT AT 9, 4; INK 7; "Floors: 10"
1112 PRINT AT 10, 4; INK 7; "Kills: "; q
1114 PRINT AT 11, 4; INK 6; "Gold: "; g
1116 PRINT AT 12, 4; INK 7; "Turns: "; b
1118 PRINT AT 14, 4; INK 5; "HP remaining: "; h
1120 BEEP 0.1, 12: BEEP 0.1, 16: BEEP 0.2, 19: BEEP 0.3, 24
1122 PRINT AT 18, 6; INK 7; "Press any key"
1124 PAUSE 0
1126 STOP
1500 REM === MONSTER DATA ===
1502 DATA "Rat", 4, 1, 0, 2
1504 DATA "Goblin", 8, 2, 1, 5
1506 DATA "Skeleton", 12, 3, 2, 8
1508 DATA "Troll", 18, 4, 2, 12
1510 DATA "Wraith", 15, 5, 1, 15
1512 DATA "Dragon", 30, 6, 4, 50
1600 REM === find empty cell ===
1602 LET t = INT (RND * 14) + 2
1604 LET t2 = INT (RND * 14) + 2
1606 IF d(t2,t) <> 0 THEN GO TO 1602
1608 IF t = x AND t2 = y THEN GO TO 1602
1610 RETURN
1700 REM === pick monster for slot i ===
1702 IF e <= 3 THEN LET t = INT (RND * 2) + 1: GO TO 1720
1704 IF e <= 5 THEN LET t = INT (RND * 3) + 1: GO TO 1720
1706 IF e <= 7 THEN LET t = INT (RND * 4) + 2: GO TO 1720
1708 IF e <= 9 THEN LET t = INT (RND * 4) + 3: GO TO 1720
1710 LET t = 6
1720 LET l(i) = t
1722 RESTORE 1500
1724 FOR c = 1 TO t - 1: READ i$, t2, t3, t4, t5: NEXT c
1726 READ i$, t2, t3, t4, t5
1728 LET n(i) = t2
1730 RETURN
2500 REM === title screen ===
2510 PRINT AT 3, 4; INK 7; BRIGHT 1; "DUNGEONS OF DORIN"
2520 PRINT AT 6, 2; INK 6; "Descend ten floors of"
2525 PRINT AT 7, 2; INK 6; "darkness. Find the Heart."
2530 PRINT AT 9, 2; INK 7; "Q/A = up/down"
2535 PRINT AT 10, 2; INK 7; "O/P = left/right"
2540 PRINT AT 11, 2; INK 7; "H = use potion"
2550 PRINT AT 13, 2; INK 5; "Monsters grow stronger"
2555 PRINT AT 14, 2; INK 5; "on deeper floors."
2570 PRINT AT 16, 2; INK 4; "@ = you  M = monster"
2575 PRINT AT 17, 2; INK 4; "> = stairs  $ = chest"
2580 PRINT AT 20, 6; INK 7; "Press any key"
2590 PAUSE 0
2595 CLS
2598 RETURN

What You Built

A complete RPG with five interacting systems:

Procedural generation:

16x16 dungeon grid with 3-5 random rooms per floor
L-shaped corridors connecting every room
Stairs, chests, fountains, and monsters placed during generation
Different layout on every run

Exploration:

Turn-based QAOP movement with wall collision
7x7 viewport centred on the player
Fog of war with visibility tracking
Status panel showing all stats and equipment bonuses

Combat:

Turn-based with attack and flee options
Dice roll formula: INT(RND*6)+1 + stat - defence
Minimum 1 damage prevents stalemates
Six monster types from rat to dragon
Monster drops on defeat

Equipment and inventory:

Weapons boost attack, armour boosts defence
Automatic upgrade on pickup — better items replace weaker ones
Potions heal 10 HP, maximum 3 carried
Fountains restore full HP once
Floor-based scaling for equipment quality

Progression:

Ten floors of escalating difficulty
Monster type pools deepen with floor number
Victory at the Heart of Dorin on floor 10
Death screen with run statistics
Save and load for persistent progress

The Five Systems

This is the most complex game the learner has built. Previous games had one or two interacting systems — movement plus collision, or a board plus rules. Dungeons of Dorin has five: movement, combat, inventory, procedural generation, and persistence. Each system touches the others:

Generation creates the dungeon that movement traverses
Movement triggers combat by walking into monsters
Combat uses stats modified by inventory (weapons, armour)
Inventory items come from generation (chests) and combat (drops)
Persistence captures all four systems in a save file

This web of dependencies is what makes the game feel cohesive. No system exists in isolation. Change one — add a new monster type, adjust the potion heal amount, alter the room size range — and the effects ripple through the others.

Turn-Based Advantage

The turn-based design made this complexity possible in BASIC. There is no frame rate pressure. The interpreter processes each turn as slowly as it needs to — checking walls, scanning monster arrays, rendering the viewport, updating the status panel. In a real-time game, this processing would create visible lag. In a turn-based game, it is invisible. The player waits for input, the game processes, and the result appears.

This is a deliberate lesson. Complex systems are viable in any language when you remove the clock. The constraint is not processing power — it is time pressure.

What Comes Next

Game 16, The Cursed Manor, is the capstone. It builds on everything from Dungeons of Dorin — arrays, subroutines, state management, multiple interacting systems — and adds autonomous NPCs, a richer world simulation, and a narrative that reacts to player choices. The skills practised here are the foundation for the most ambitious game in the curriculum.

Try This

Play through all ten floors. Complete the game from start to finish. Note your final stats. Then play again and try to beat your turn count, kill count, or remaining HP.

Read the complete listing. Follow the flow from line 5 to the end. Trace the path from title screen to dungeon generation to main loop to combat to stairs to victory. Every line serves a purpose. Understanding the complete program — how data flows through variables, how subroutines connect, how the main loop orchestrates everything — is the goal of this game.