diff --git a/bukkit/site/lab0x13/scrow/commands/bukkit/suggestionprovider/PlayerSuggestionProvider.java b/bukkit/site/lab0x13/scrow/commands/bukkit/suggestionprovider/PlayerSuggestionProvider.java
new file mode 100644
index 0000000..f8f22af
--- /dev/null
+++ b/bukkit/site/lab0x13/scrow/commands/bukkit/suggestionprovider/PlayerSuggestionProvider.java
@@ -0,0 +1,17 @@
+package site.lab0x13.scrow.commands.bukkit.suggestionprovider;
+
+import org.bukkit.Bukkit;
+import org.bukkit.entity.Player;
+import site.lab0x13.scrow.commands.model.CommandContext;
+import site.lab0x13.scrow.commands.model.SuggestionProvider;
+
+import java.util.List;
+
+public final class PlayerSuggestionProvider<C extends CommandContext<C>> implements SuggestionProvider<C> {
+    @Override
+    public List<String> suggest(C __, String ___) {
+        return Bukkit.getOnlinePlayers().stream()
+                .map(Player::getName)
+                .toList();
+    }
+}
diff --git a/bukkit/site/lab0x13/scrow/commands/bukkit/type/OfflinePlayerArgumentType.java b/bukkit/site/lab0x13/scrow/commands/bukkit/type/OfflinePlayerArgumentType.java
new file mode 100644
index 0000000..736e943
--- /dev/null
+++ b/bukkit/site/lab0x13/scrow/commands/bukkit/type/OfflinePlayerArgumentType.java
@@ -0,0 +1,33 @@
+package site.lab0x13.scrow.commands.bukkit.type;
+
+import com.leakyabstractions.result.api.Result;
+import com.leakyabstractions.result.core.Results;
+import org.bukkit.Bukkit;
+import org.bukkit.OfflinePlayer;
+import site.lab0x13.scrow.commands.bukkit.suggestionprovider.PlayerSuggestionProvider;
+import site.lab0x13.scrow.commands.model.CommandContext;
+import site.lab0x13.scrow.commands.model.SuggestionProvider;
+import site.lab0x13.scrow.commands.model.argument.ArgumentType;
+
+import java.util.UUID;
+
+public class OfflinePlayerArgumentType<C extends CommandContext<C>> implements ArgumentType<C, OfflinePlayer> {
+
+    @Override
+    public Result<OfflinePlayer, String> parseInput(String string) {
+        // UUIDs are always 36 chars
+        if (string.length() == 36)
+            return Results.ofCallable(() -> Bukkit.getOfflinePlayer(UUID.fromString(string)))
+                    .mapFailure(_ -> "Invalid UUID.");
+
+        var player = Bukkit.getPlayerExact(string);
+        if (player == null || (!player.hasPlayedBefore() && !player.isOnline()))
+            return Results.failure("Player not found.");
+        return Results.success(player);
+    }
+
+    @Override
+    public SuggestionProvider<C> defaultSuggestionProvider() {
+        return new PlayerSuggestionProvider<>();
+    }
+}
diff --git a/bukkit/site/lab0x13/scrow/commands/bukkit/type/PlayerArgumentType.java b/bukkit/site/lab0x13/scrow/commands/bukkit/type/PlayerArgumentType.java
new file mode 100644
index 0000000..a4ee350
--- /dev/null
+++ b/bukkit/site/lab0x13/scrow/commands/bukkit/type/PlayerArgumentType.java
@@ -0,0 +1,37 @@
+package site.lab0x13.scrow.commands.bukkit.type;
+
+import com.leakyabstractions.result.api.Result;
+import com.leakyabstractions.result.core.Results;
+import org.bukkit.Bukkit;
+import org.bukkit.entity.Player;
+import site.lab0x13.scrow.commands.bukkit.suggestionprovider.PlayerSuggestionProvider;
+import site.lab0x13.scrow.commands.model.CommandContext;
+import site.lab0x13.scrow.commands.model.SuggestionProvider;
+import site.lab0x13.scrow.commands.model.argument.ArgumentType;
+
+import java.util.UUID;
+
+public class PlayerArgumentType<C extends CommandContext<C>> implements ArgumentType<C, Player> {
+
+    @Override
+    public Result<Player, String> parseInput(String input) {
+        // UUIDs are always 36 chars
+        Player player;
+        if (input.length() == 36) {
+            try {
+                player = Bukkit.getPlayer(UUID.fromString(input));
+            } catch (IllegalArgumentException _) {
+                return Results.failure("Invalid UUID.");
+            }
+        } else {
+            player = Bukkit.getPlayer(input);
+        }
+
+        return Results.ofNullable(player, "Player not online.");
+    }
+
+    @Override
+    public SuggestionProvider<C> defaultSuggestionProvider() {
+        return new PlayerSuggestionProvider<>();
+    }
+}
diff --git a/bukkit/site/lab0x13/scrow/commands/bukkit/type/WorldArgumentType.java b/bukkit/site/lab0x13/scrow/commands/bukkit/type/WorldArgumentType.java
new file mode 100644
index 0000000..632c2cb
--- /dev/null
+++ b/bukkit/site/lab0x13/scrow/commands/bukkit/type/WorldArgumentType.java
@@ -0,0 +1,38 @@
+package site.lab0x13.scrow.commands.bukkit.type;
+
+import com.leakyabstractions.result.api.Result;
+import com.leakyabstractions.result.core.Results;
+import org.bukkit.Bukkit;
+import org.bukkit.World;
+import site.lab0x13.scrow.commands.model.CommandContext;
+import site.lab0x13.scrow.commands.model.SuggestionProvider;
+import site.lab0x13.scrow.commands.model.argument.ArgumentType;
+
+import java.util.UUID;
+import java.util.stream.Stream;
+
+public class WorldArgumentType<C extends CommandContext<C>> implements ArgumentType<C, World> {
+    @Override
+    public Result<World, String> parseInput(String input) {
+        World world;
+        if (input.length() == 36) {
+            try {
+                world = Bukkit.getWorld(UUID.fromString(input));
+            } catch (IllegalArgumentException _) {
+                return Results.failure("Invalid UUID.");
+            }
+        } else {
+            world = Bukkit.getWorld(input);
+        }
+
+        return Results.ofNullable(world, "World not found");
+    }
+
+    @Override
+    public SuggestionProvider<C> defaultSuggestionProvider() {
+        return (_, _) -> Stream.concat(
+                Bukkit.getWorlds().stream().map(World::getName),
+                Bukkit.getWorlds().stream().map(w -> w.getUID().toString())
+        ).toList();
+    }
+}
diff --git a/defs.bzl b/defs.bzl
index 804a5d5..e29bd24 100644
--- a/defs.bzl
+++ b/defs.bzl
@@ -1,2 +1,2 @@
 GROUP = "site.lab0x13.scrow"
-VERSION = "0.5"
\ No newline at end of file
+VERSION = "0.6"
\ No newline at end of file
diff --git a/velocity/site/lab0x13/scrow/commands/velocity/suggestionprovider/PlayerSuggestionProvider.java b/velocity/site/lab0x13/scrow/commands/velocity/suggestionprovider/PlayerSuggestionProvider.java
new file mode 100644
index 0000000..3e90e07
--- /dev/null
+++ b/velocity/site/lab0x13/scrow/commands/velocity/suggestionprovider/PlayerSuggestionProvider.java
@@ -0,0 +1,24 @@
+package suggestionprovider;
+
+import com.velocitypowered.api.proxy.Player;
+import com.velocitypowered.api.proxy.ProxyServer;
+import site.lab0x13.scrow.commands.model.CommandContext;
+import site.lab0x13.scrow.commands.model.SuggestionProvider;
+
+import java.util.List;
+
+public final class PlayerSuggestionProvider<C extends CommandContext<C>> implements SuggestionProvider<C> {
+
+    private final ProxyServer proxyServer;
+
+    public PlayerSuggestionProvider(ProxyServer proxyServer) {
+        this.proxyServer = proxyServer;
+    }
+
+    @Override
+    public List<String> suggest(C __, String ___) {
+        return proxyServer.getAllPlayers().stream()
+                .map(Player::getUsername)
+                .toList();
+    }
+}
diff --git a/velocity/site/lab0x13/scrow/commands/velocity/type/PlayerArgumentType.java b/velocity/site/lab0x13/scrow/commands/velocity/type/PlayerArgumentType.java
new file mode 100644
index 0000000..3ff4f0e
--- /dev/null
+++ b/velocity/site/lab0x13/scrow/commands/velocity/type/PlayerArgumentType.java
@@ -0,0 +1,43 @@
+package type;
+
+import com.leakyabstractions.result.api.Result;
+import com.leakyabstractions.result.core.Results;
+import com.velocitypowered.api.command.CommandSource;
+import com.velocitypowered.api.proxy.Player;
+import com.velocitypowered.api.proxy.ProxyServer;
+import site.lab0x13.scrow.commands.model.CommandContext;
+import site.lab0x13.scrow.commands.model.SuggestionProvider;
+import site.lab0x13.scrow.commands.model.argument.ArgumentType;
+import suggestionprovider.PlayerSuggestionProvider;
+
+import java.util.UUID;
+
+public class PlayerArgumentType<C extends CommandSource & CommandContext<C>> implements ArgumentType<C, Player> {
+
+    private final ProxyServer server;
+
+    public PlayerArgumentType(ProxyServer server) {
+        this.server = server;
+    }
+
+    @Override
+    public Result<Player, String> parseInput(String input) {
+        Player player;
+        if (input.length() == 36) {
+            try {
+                player = server.getPlayer(UUID.fromString(input)).orElse(null);
+            } catch (IllegalArgumentException _) {
+                return Results.failure("Invalid UUID.");
+            }
+        } else {
+            player = server.getPlayer(input).orElse(null);
+        }
+
+        return Results.ofNullable(player, "Player not online.");
+    }
+
+    @Override
+    public SuggestionProvider<C> defaultSuggestionProvider() {
+        return new PlayerSuggestionProvider<>(server);
+    }
+}