diff --git a/src/compiler/generator/gen_break.c b/src/compiler/generator/gen_break.c
new file mode 100644
index 0000000..e48edcd
--- /dev/null
+++ b/src/compiler/generator/gen_break.c
@@ -0,0 +1,32 @@
+#include <compiler/fzl_gen.h>
+#include <compiler/internals/gen.h>
+#include <stdbool.h>
+#include <stdio.h>
+
+// Break keyword
+bool gen_break(fzl_gen_t *gen, fzl_node_t *node)
+{
+  if (!gen || !node)
+    return false;
+
+  fzl_gen_ctx_t *ctx = gen->ctx;
+  while (ctx != NULL)
+  {
+    if (ctx && ctx->type == FZL_GEN_CTX_TYPE_LOOP)
+      break;
+
+    ctx = ctx->parent;
+  }
+
+  if (!ctx || ctx->type != FZL_GEN_CTX_TYPE_LOOP)
+    return false;
+
+  for (size_t i = gen->syms_top - 1; i > ctx->level + 1; i--)
+    gen_op(gen, FZL_OPCODE_RM_ENVTABLE);
+
+  gen_op(gen, FZL_OPCODE_JMP);
+  ctx->loop.breaks[ctx->loop.breaks_count++] = gen->ops_count;
+  gen_word(gen, 0);
+
+  return true;
+}
diff --git a/src/compiler/generator/gen_class.c b/src/compiler/generator/gen_class.c
new file mode 100644
index 0000000..7a8a3f5
--- /dev/null
+++ b/src/compiler/generator/gen_class.c
@@ -0,0 +1,81 @@
+#include <common/fzl_types.h>
+#include <compiler/fzl_gen.h>
+#include <compiler/internals/gen.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <string.h>
+
+// Class definition
+bool gen_class(fzl_gen_t *gen, fzl_node_t *node)
+{
+  if (!gen || !node)
+    return false;
+
+  fzl_gen_ctx_t *ctx = gen_ctx(gen, FZL_GEN_CTX_TYPE_CLASS, node);
+  if (!ctx)
+    return false;
+
+  gen->classes[gen->classes_count] = fzl_mkctable(node->class.name->value);
+  fzl_ctable_t *class              = gen->classes[gen->classes_count++];
+  class->name                      = node->class.name->value;
+
+  for (size_t i = 0; i < node->class.fields_count; i++)
+  {
+    if (class->fields_remainder <= class->fields_count)
+    {
+      class->fields_remainder *= 2;
+      class->fields = realloc(class->fields, class->fields_remainder *
+                                                 sizeof(fzl_ctable_field_t));
+    }
+
+    fzl_type_t type;
+    char typecn[256];
+    memset(typecn, 0, sizeof(typecn));
+
+    bool resolved =
+        gen_resolve_type(gen, node->class.fields[i]->var.type, &type, typecn);
+    if (!resolved)
+    {
+      free(class->fields);
+      return false;
+    }
+
+    class->fields[class->fields_count] = (fzl_ctable_field_t){
+        .name       = node->class.fields[i]->var.identifier->token->value,
+        .type       = type,
+        .slot_index = class->fields_count++};
+  }
+
+  for (size_t i = 0; i < node->class.methods_count; i++)
+  {
+    fzl_node_t *fn = node->class.methods[i];
+
+    size_t classname_len = strlen(class->name);
+    size_t fnname_len    = strlen(fn->fn.name->value);
+    char *method_name    = malloc(classname_len + fnname_len + 2);
+
+    strcpy(method_name, class->name);
+    method_name[classname_len] = '_';
+    strcpy((method_name + classname_len + 1), fn->fn.name->value);
+    method_name[classname_len + fnname_len + 1] = 0;
+
+    if (fn->fn.name->value)
+      free(fn->fn.name->value);
+
+    fn->fn.name->value = method_name;
+    if (!gen_common(gen, fn))
+    {
+      free(class->fields);
+      return false;
+    }
+  }
+
+  ctx = gen_fin_ctx(gen);
+  if (!ctx)
+  {
+    free(class->fields);
+    return false;
+  }
+
+  return true;
+}
diff --git a/src/compiler/generator/gen_fmtstr.c b/src/compiler/generator/gen_fmtstr.c
new file mode 100644
index 0000000..88f134d
--- /dev/null
+++ b/src/compiler/generator/gen_fmtstr.c
@@ -0,0 +1,18 @@
+#include <compiler/internals/gen.h>
+#include <stdbool.h>
+
+// Format string
+bool gen_fmtstr(fzl_gen_t *gen, fzl_node_t *node)
+{
+  if (!gen || !node)
+    return false;
+
+  for (size_t i = 0; i < node->list.entry_count; i++)
+    if (!gen_common(gen, node->list.entries[i]))
+      return false;
+
+  gen_op(gen, FZL_OPCODE_BUILD_STR);
+  gen_word(gen, node->list.entry_count);
+
+  return true;
+}
diff --git a/src/compiler/generator/gen_loop.c b/src/compiler/generator/gen_loop.c
new file mode 100644
index 0000000..50a7268
--- /dev/null
+++ b/src/compiler/generator/gen_loop.c
@@ -0,0 +1,61 @@
+#include <compiler/fzl_gen.h>
+#include <compiler/internals/gen.h>
+#include <stdbool.h>
+
+// While or for loops
+bool gen_loop(fzl_gen_t *gen, fzl_node_t *node)
+{
+  if (!gen || !node)
+    return false;
+
+  fzl_gen_ctx_t *ctx = gen_ctx(gen, FZL_GEN_CTX_TYPE_LOOP, node);
+  if (!ctx)
+    return false;
+
+  gen_op(gen, FZL_OPCODE_MK_ENVTABLE);
+
+  if (node->loop.init)
+    if (!gen_common(gen, node->loop.init))
+      return false;
+
+  size_t start_ip = gen->ops_count;
+  if (node->loop.cond)
+  {
+    if (!gen_common(gen, node->loop.cond))
+      return false;
+  }
+  else
+  {
+    gen_op(gen, FZL_OPCODE_PUSHNUM);
+    gen_word(gen, 1);
+  }
+
+  gen_op(gen, FZL_OPCODE_JZ);
+  ctx->loop.breaks[ctx->loop.breaks_count++] = gen->ops_count;
+  gen_word(gen, 0);
+
+  if (!gen_common(gen, node->loop.body))
+    return false;
+
+  if (node->loop.step)
+    if (!gen_common(gen, node->loop.step))
+      return false;
+
+  gen_op(gen, FZL_OPCODE_JMP);
+  gen_word(gen, start_ip);
+
+  // backpatch `break`s
+  for (size_t i = 0; i < ctx->loop.breaks_count; i++)
+    gen->ops[ctx->loop.breaks[i]] = gen->ops_count;
+
+  gen_op(gen, FZL_OPCODE_RM_ENVTABLE);
+
+  for (size_t i = gen->syms_top - 1; i > ctx->level; i--)
+    fzl_freesymt(gen->syms[--gen->syms_top]);
+
+  ctx = gen_fin_ctx(gen);
+  if (!ctx)
+    return false;
+
+  return true;
+}