diff --git a/dcb-exe/src/func.rs b/dcb-exe/src/func.rs
index c73baa8..0ccabf3 100644
--- a/dcb-exe/src/func.rs
+++ b/dcb-exe/src/func.rs
@@ -6,9 +6,11 @@
 //! type.
 
 // Modules
+pub mod kind;
 pub mod table;
 
 // Exports
+pub use kind::FuncKind;
 pub use table::FuncTable;
 
 // Imports
@@ -54,6 +56,9 @@ pub struct Func {
 
 	/// End position (non-inclusive)
 	pub end_pos: Pos,
+
+	/// Kind
+	pub kind: FuncKind,
 }
 
 impl Func {
@@ -201,6 +206,7 @@ impl Func {
 				labels,
 				start_pos: func_pos,
 				end_pos,
+				kind: FuncKind::Heuristics,
 			};
 			assert!(cur_funcs.insert(func));
 		}
diff --git a/dcb-exe/src/func/kind.rs b/dcb-exe/src/func/kind.rs
new file mode 100644
index 0000000..b3f38fb
--- /dev/null
+++ b/dcb-exe/src/func/kind.rs
@@ -0,0 +1,38 @@
+//! Function kind
+
+/// Function kind
+#[derive(PartialEq, Eq, Clone, Copy, Debug)]
+#[derive(serde::Serialize, serde::Deserialize)]
+pub enum FuncKind {
+	/// Known
+	Known,
+
+	/// Heuristics
+	Heuristics,
+}
+
+impl FuncKind {
+	/// Returns `Self::Known`
+	#[must_use]
+	pub const fn known() -> Self {
+		Self::Known
+	}
+
+	/// Returns `Self::Heuristics`
+	#[must_use]
+	pub const fn heuristics() -> Self {
+		Self::Heuristics
+	}
+
+	/// Returns `true` if the function kind is [`Known`](Self::Known).
+	#[must_use]
+	pub const fn is_known(self) -> bool {
+		matches!(self, Self::Known)
+	}
+
+	/// Returns `true` if the function kind is [`Heuristics`](Self::Heuristics).
+	#[must_use]
+	pub const fn is_heuristics(self) -> bool {
+		matches!(self, Self::Heuristics)
+	}
+}
diff --git a/resources/game_funcs.yaml b/resources/game_funcs.yaml
index 0666c74..b3a6b72 100644
--- a/resources/game_funcs.yaml
+++ b/resources/game_funcs.yaml
@@ -16,6 +16,7 @@
     0x80056280: zero_loop
   start_pos: 0x80056270
   end_pos: 0x80056330
+  kind: Known
 
 # Main game loop
 - name: main_loop
@@ -36,6 +37,7 @@
     0x80013f8c: "4"
   start_pos: 0x80013e4c
   end_pos: 0x80013fa4
+  kind: Known
 
 # ???
 - name: something1
@@ -51,6 +53,7 @@
     0x80056370: skip
   start_pos: 0x80056330
   end_pos: 0x80056388
+  kind: Known
 
 - name: call_func_arr
   desc: |-
@@ -73,6 +76,7 @@
     0x800563d0: exit
   start_pos: 0x80056388
   end_pos: 0x800563e4
+  kind: Known
 
 # ?
 - name: something3
@@ -83,6 +87,7 @@
     0x8005660c: "Calls FuncList1[3] (i.e. something5)"
   start_pos: 0x800565f4
   end_pos: 0x80056624
+  kind: Known
 
 # ?
 - name: something5
@@ -107,6 +112,7 @@
     0x80056800: skip_call
   start_pos: 0x80056788
   end_pos: 0x80056860
+  kind: Known
 
 # ?
 - name: something6
@@ -139,6 +145,7 @@
     0x80056548: exit
   start_pos: 0x800563e4
   end_pos: 0x8005655c
+  kind: Known
 
 # ?
 - name: something7
@@ -156,6 +163,7 @@
     0x800565e4: exit
   start_pos: 0x8005655c
   end_pos: 0x800565f4
+  kind: Known
 
 #?
 - name: something4
@@ -171,6 +179,7 @@
     0x80056b58: "7"
   start_pos: 0x80056a30
   end_pos: 0x80056b78
+  kind: Known
 
 - name: memset_zero
   signature: "fn(u32* ptr, u32 size)"
@@ -187,18 +196,21 @@
     0x80056cac: exit
   start_pos: 0x80056c90
   end_pos: 0x80056cb4
+  kind: Known
 
 - name: save_registers
   signature: fn(u32* pos)
   desc: "Saves the following registers in `pos[0x0 .. 0x30]`.\n$ra, $gp, $sp, $fp,\n$s0, $s1, $s2, $s3,\n$s4, $s5, $s6, $s7,\n"
   start_pos: 0x8006a674
   end_pos: 0x8006a6b0
+  kind: Known
 
 - name: load_registers
   signature: fn(u32* pos)
   desc: "Loads the following registers from `pos[0x0 .. 0x30]`.\n$ra, $gp, $sp, $fp,\n$s0, $s1, $s2, $s3,\n$s4, $s5, $s6, $s7,\n"
   start_pos: 0x8006a6b0
   end_pos: 0x8006a6fc
+  kind: Known
 
 - name: prng_next
   signature: fn()
@@ -207,6 +219,7 @@
     Returns `cur_prng_value << 0x10 | 0x7fff`.
   start_pos: 0x80069124
   end_pos: 0x80069154
+  kind: Known
 
 - name: something8
   signature: "fn(a: u32, b: u32, c: u32, d: u32)"
@@ -215,6 +228,7 @@
     0x80061910: "args: ($s1, $s0, c & 0xffff, d & 0xffff)"
   start_pos: 0x800618e4
   end_pos: 0x80061954
+  kind: Known
 
 - name: modify_spu_delay1
   signature: "fn() -> u32"
@@ -226,6 +240,7 @@
     0x8004b474: "*SPU_DELAY = $v0"
   start_pos: 0x8004b428
   end_pos: 0x8004b450
+  kind: Known
 
 - name: modify_spu_delay2
   signature: "fn() -> u32"
@@ -237,6 +252,7 @@
     0x8004b474: "*SPU_DELAY = $v0"
   start_pos: 0x8004b450
   end_pos: 0x8004b478
+  kind: Known
 
 - name: calc_0x890e6fbd
   signature: "fn() -> u32"
@@ -260,10 +276,12 @@
     0x8004b4b8: "while_condition"
   start_pos: 0x8004b478
   end_pos: 0x8004b4d4
+  kind: Known
 
 - name: something9
   start_pos: 0x80013fa4
   end_pos: 0x800141b8
+  kind: Known
   labels:
     0x80013fe4: "0"
     0x80014058: "1"
@@ -275,6 +293,7 @@
 - name: something10
   start_pos: 0x800141b8
   end_pos: 0x800142d0
+  kind: Known
   labels:
     0x800141ec: "0"
     0x80014268: "1"
@@ -284,6 +303,7 @@
 - name: something11
   start_pos: 0x800142d0
   end_pos: 0x80014364
+  kind: Known
   labels:
     0x8001431c: "0"
     0x80014320: "1"
@@ -292,126 +312,157 @@
 - name: something12
   start_pos: 0x80015328
   end_pos: 0x800157b0
+  kind: Known
 
 - name: something13
   start_pos: 0x800148f8
   end_pos: 0x80014970
+  kind: Known
 
 - name: something14
   start_pos: 0x80014b94
   end_pos: 0x80014c08
+  kind: Known
 
 - name: something15
   start_pos: 0x8002a7cc
   end_pos: 0x8002ab5c
+  kind: Known
 
 - name: something16
   start_pos: 0x8001b358
   end_pos: 0x8001b438
+  kind: Known
 
 - name: something17
   start_pos: 0x8002c1c0
   end_pos: 0x8002cc44
+  kind: Known
 
 - name: something18
   start_pos: 0x80015a3c
   end_pos: 0x80015ad8
+  kind: Known
 
 - name: something19
   start_pos: 0x800162f0
   end_pos: 0x80016878
+  kind: Known
 
 - name: something20
   start_pos: 0x8001963c
   end_pos: 0x80019ea4
+  kind: Known
 
 - name: something21
   start_pos: 0x8001a1d8
   end_pos: 0x8001a600
+  kind: Known
 
 - name: something22
   start_pos: 0x8001a870
   end_pos: 0x8001a9b0
+  kind: Known
 
 - name: something23
   start_pos: 0x8001b088
   end_pos: 0x8001b10c
+  kind: Known
 
 - name: something24
   start_pos: 0x8001b734
   end_pos: 0x8001b90c
+  kind: Known
 
 - name: something25
   start_pos: 0x8001bb44
   end_pos: 0x8001bb94
+  kind: Known
 
 - name: something26
   start_pos: 0x8001bc38
   end_pos: 0x8001bca4
+  kind: Known
 
 - name: something27
   start_pos: 0x8001c0a8
   end_pos: 0x8001c1e0
+  kind: Known
 
 - name: something28
   start_pos: 0x8001c220
   end_pos: 0x8001d900
+  kind: Known
 
 - name: something29
   start_pos: 0x8001da24
   end_pos: 0x8001dfe0
+  kind: Known
 
 - name: something30
   start_pos: 0x8001e180
   end_pos: 0x8001e53c
+  kind: Known
 
 - name: something31
   start_pos: 0x8001e850
   end_pos: 0x8001e894
+  kind: Known
 
 - name: something32
   start_pos: 0x8001f094
   end_pos: 0x8001f3c0
+  kind: Known
 
 - name: something33
   start_pos: 0x8001f5cc
   end_pos: 0x8001f5fc
+  kind: Known
 
 - name: something34
   start_pos: 0x8001f630
   end_pos: 0x8001f660
+  kind: Known
 
 - name: something35
   start_pos: 0x8001f6c4
   end_pos: 0x8001f768
+  kind: Known
 
 - name: something36
   start_pos: 0x8001f768
   end_pos: 0x8001f824
+  kind: Known
 
 - name: something37
   start_pos: 0x8001f824
   end_pos: 0x8001f8b0
+  kind: Known
 
 - name: something38
   start_pos: 0x8001f8b0
   end_pos: 0x8001f94c
+  kind: Known
 
 - name: something39
   start_pos: 0x8005aa7c
   end_pos: 0x8005ab4c
+  kind: Known
 
 - name: something40
   start_pos: 0x8005a7d4
   end_pos: 0x8005a808
+  kind: Known
 
 - name: something41
   start_pos: 0x80049e80
   end_pos: 0x80049ef8
+  kind: Known
 
 - name: something42
   start_pos: 0x8004b2f0
   end_pos: 0x8004b394
+  kind: Known
   inline_comments:
     0x8004b2f0: "Division by 0"
 
@@ -424,36 +475,43 @@
     0x8006a73c: "arg: 0x39"
   start_pos: 0x8006a734
   end_pos: 0x8006a744
+  kind: Known
 - name: FlushCache
   signature: "fn()"
   desc: Calls A(0x44)
   start_pos: 0x8006a744
   end_pos: 0x8006a754
+  kind: Known
 - name: GPU_cw
   signature: "fn(cmd: u32)"
   desc: Calls A(0x49)
   start_pos: 0x8006a754
   end_pos: 0x8006a764
+  kind: Known
 - name: _bu_init
   signature: "fn()"
   desc: Calls A(0x70)
   start_pos: 0x80068804
   end_pos: 0x80068814
+  kind: Known
 - name: CdRemove
   signature: "fn()"
   desc: Calls A(0x72)
   start_pos: 0x8006a76c
   end_pos: 0x8006a77c
+  kind: Known
 - name: _card_info
   signature: "fn(port: u32)"
   desc: Calls A(0xab)
   start_pos: 0x80068814
   end_pos: 0x80068824
+  kind: Known
 - name: _card_async_load_directory
   signature: "fn(port: u32)"
   desc: Calls A(0xac)
   start_pos: 0x80068824
   end_pos: 0x80068834
+  kind: Known
 
 # B Functions
 - name: DeliverEvent
@@ -461,131 +519,157 @@
   desc: Calls B(0x07)
   start_pos: 0x8006a784
   end_pos: 0x8006a794
+  kind: Known
 - name: OpenEvent
   signature: "fn(class: u32, spec: u32, mode: u32, func: u32)"
   desc: Calls B(0x08)
   start_pos: 0x8006a794
   end_pos: 0x8006a7a4
+  kind: Known
 - name: WaitEvent
   signature: "fn(event: u32)"
   desc: Calls B(0x0a)
   start_pos: 0x8006a7a4
   end_pos: 0x8006a7b4
+  kind: Known
 - name: TestEvent
   signature: "fn(event: u32)"
   desc: Calls B(0x0b)
   start_pos: 0x8006a7b4
   end_pos: 0x8006a7c4
+  kind: Known
 - name: EnableEvent
   signature: "fn(event: u32)"
   desc: Calls B(0x0c)
   start_pos: 0x8006a7c4
   end_pos: 0x8006a7d4
+  kind: Known
 - name: InitPad
   signature: "fn(buf1: *mut u8, size1: u32, buf2: *mut u8, size2: u32)"
   desc: Calls B(0x12)
   start_pos: 0x8006af54
   end_pos: 0x8006af64
+  kind: Known
 - name: StartPad
   signature: "fn()"
   desc: Calls B(0x13)
   start_pos: 0x8006af64
   end_pos: 0x8006af74
+  kind: Known
 - name: OutdatedPadInitAndStart
   signature: "fn(type: u32, button_dest: *mut u8, unused1: u32, unused2: u32)"
   desc: Calls B(0x15)
   start_pos: 0x8006af74
   end_pos: 0x8006af84
+  kind: Known
 - name: ReturnFromException
   signature: "fn()"
   desc: Calls B(0x17)
   start_pos: 0x8006a7d4
   end_pos: 0x8006a7e4
+  kind: Known
 - name: SetDefaultExitFromException
   signature: "fn()"
   desc: Calls B(0x18)
   start_pos: 0x8006a7e4
   end_pos: 0x8006a7f4
+  kind: Known
 - name: SetCustomExitFromException
   signature: "fn(addr: fn())"
   desc: Calls B(0x19)
   start_pos: 0x8006a7f4
   end_pos: 0x8006a804
+  kind: Known
 - name: FileOpen
   signature: "fn(filename: *const str, access_mode: u32)"
   desc: Calls B(0x32)
   start_pos: 0x8006a824
   end_pos: 0x8006a834
+  kind: Known
 - name: FileSeek
   signature: "fn(fd: u32, offset: u32, seek_type: u32)"
   desc: Calls B(0x33)
   start_pos: 0x8006a834
   end_pos: 0x8006a844
+  kind: Known
 - name: FileRead
   signature: "fn(fd: u32, dst: *mut u8, length: u32)"
   desc: Calls B(0x34)
   start_pos: 0x8006a844
   end_pos: 0x8006a854
+  kind: Known
 - name: FileWrite
   signature: "fn(fd: u32, src: *const u8, length: u32)"
   desc: Calls B(0x35)
   start_pos: 0x8006a854
   end_pos: 0x8006a864
+  kind: Known
 - name: FileClose
   signature: "fn(fd: u32)"
   desc: Calls B(0x36)
   start_pos: 0x8006a864
   end_pos: 0x8006a874
+  kind: Known
 - name: firstfile
   signature: "fn(filename: *const str, dir_entry: u32)"
   desc: Calls B(0x42)
   start_pos: 0x8006acb4
   end_pos: 0x8006acc4
+  kind: Known
 - name: nextfile
   signature: "fn(dir_entry: u32)"
   desc: Calls B(0x43)
   start_pos: 0x8006a874
   end_pos: 0x8006a884
+  kind: Known
 - name: InitCard
   signature: "fn(pad_enable: u32)"
   desc: Calls B(0x4a)
   start_pos: 0x80068994
   end_pos: 0x800689a4
+  kind: Known
 - name: StartCard
   signature: "fn()"
   desc: Calls B(0x4b)
   start_pos: 0x800689a4
   end_pos: 0x800689b4
+  kind: Known
 - name: StopCard
   signature: "fn()"
   desc: Calls B(0x4c)
   start_pos: 0x800689b4
   end_pos: 0x800689c4
+  kind: Known
 - name: write_card_sector
   signature: "fn(port: u32, sector: u32, src: *const u8)"
   desc: Calls B(0x4e)
   start_pos: 0x80068874
   end_pos: 0x80068884
+  kind: Known
 - name: read_card_sector
   signature: "fn(port: u32, sector: u32, dst: *mut u8)"
   desc: Calls B(0x4f)
   start_pos: 0x80069024
   end_pos: 0x80069034
+  kind: Known
 - name: allow_new_card
   signature: "fn()"
   desc: Calls B(0x50)
   start_pos: 0x80068884
   end_pos: 0x80068894
+  kind: Known
 - name: ChangeClearPad
   signature: "fn(pad: u32)"
   desc: Calls B(0x5b)
   start_pos: 0x8006a884
   end_pos: 0x8006a894
+  kind: Known
 - name: get_card_status
   signature: "fn(slot: u32)"
   desc: Calls B(0x5c)
   start_pos: 0x80069034
   end_pos: 0x80069044
+  kind: Known
 
 # C Functions
 - name: SysEnqIntRP
@@ -593,16 +677,19 @@
   desc: Calls C(0x02)
   start_pos: 0x8006af84
   end_pos: 0x8006af94
+  kind: Known
 - name: SysDeqIntRP
   signature: "fn(priority: u32, struct: u32)"
   desc: Calls C(0x03)
   start_pos: 0x8006af94
   end_pos: 0x8006afa4
+  kind: Known
 - name: ChangeClearRCnt
   signature: "fn(t: u32, flag: u32)"
   desc: Calls C(0x0a)
   start_pos: 0x8006a894
   end_pos: 0x8006a8a0
+  kind: Known
 
 # Std
 - name: sprintf
@@ -685,6 +772,7 @@
     0x8006a570: "65"
   start_pos: 0x80069d24
   end_pos: 0x8006a5a4
+  kind: Known
 
 - name: memcpy_args_reversed
   signature: "fn(src: *const u8, dst: *mut u8, len: u32) -> *mut u8"
@@ -708,6 +796,7 @@
     0x80069070: "on_null"
   start_pos: 0x80069044
   end_pos: 0x80069078
+  kind: Known
 
 - name: mem_zero
   signature: "fn(dst: *mut u8, len: u32) -> *mut u8"
@@ -733,6 +822,7 @@
     0x800690ac: "end"
   start_pos: 0x80069084
   end_pos: 0x800690b4
+  kind: Known
 
 - name: memcpy
   signature: "fn(dst: *mut u8, src: *const u8, len: u32) -> *mut u8"
@@ -754,6 +844,7 @@
     0x800690e0: "on_null"
   start_pos: 0x800690b4
   end_pos: 0x800690e8
+  kind: Known
 
 - name: memset
   signature: "fn(dst: *mut u8, value: u32, len: u32) -> *mut u8"
@@ -775,6 +866,7 @@
     0x8006911c: "end"
   start_pos: 0x800690f4
   end_pos: 0x80069124
+  kind: Known
 
 - name: strcat
   signature: "fn(dst: *mut u8, src: *const u8) -> *mut u8"
@@ -817,6 +909,7 @@
     0x800691f0: "exit"
   start_pos: 0x80069164
   end_pos: 0x80069208
+  kind: Known
 
 - name: strlen
   signature: "fn(ptr: *const u8) -> u32"
@@ -829,6 +922,7 @@
     0x80069300: "on_null"
   start_pos: 0x800692d4
   end_pos: 0x80069308
+  kind: Known
 
 # TODO: Investigate this more, seems weird
 - name: strcmp
@@ -867,6 +961,7 @@
     0x80069270: "exit"
   start_pos: 0x80069214
   end_pos: 0x80069278
+  kind: Known
 
 - name: strcpy
   signature: "fn(dst: *mut u8, src: *const u8) -> *mut u8"
@@ -897,3 +992,4 @@
     0x800692c0: "on_null"
   start_pos: 0x80069284
   end_pos: 0x800692c8
+  kind: Known