1UP HARLOCK123

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Lonnie Allen WatsonTechnological fossil

Software architect, at the keyboard since grade school in the late '70s. These days I rebuild the arcade and RPG classics I grew up on in C# and Avalonia, so they run natively on Windows, macOS and Linux, Intel or ARM.

  • 85games
  • 8platforms each
  • 14tools & controls
  • 7NuGet packages
  • 1977oldest original

Select your game

Each one is a single self-contained program: download, unpack, run. No installer and no .NET needed.

Detected: Windows x64 Download buttons below are set for this machine. Change it to grab a build for another computer.
85 games

On Linux some games need aplay for sound, or SDL2 for gamepads on ARM. Each game's README says which.

The workbench

Editors, controls and utilities, also cross-platform with Avalonia.

Splitz_n_Joinz

Splitz_n_Joinz

Application · C# · Avalonia · .NET 10

Splits a file into numbered chunks of a size you choose, and joins them back into the original.

  • Chunks of any maximum size, in bytes, KB, MB or GB, named file.001, file.002 and on
  • Point Joinz at any one chunk: it finds the rest and lists any that are missing
  • Never touches the original, and builds a join aside, moving it into place only when complete
AVAQueryBuilder
AVAQueryBuilder screenshot

AVAQueryBuilder

Application · C# · Avalonia · .NET 9 · SQL Server

Graphical query builder for Microsoft SQL Server.

  • Builds SELECT queries as a diagram of tables, joins and filters
  • 25+ derived fields, GROUP BY with HAVING, sorting, TOP and DISTINCT
  • Finds SQL Servers on the network, runs the query and shows the rows
ControllerExplorer
ControllerExplorer screenshot

ControllerExplorer

Application · C# · Avalonia · .NET 9 · HID

Shows the raw bytes a USB or Bluetooth game controller sends, live, for writing code that reads it.

  • Lists every connected USB and Bluetooth controller by VID:PID
  • Each byte live in hex and binary, lit up the moment it changes
  • Xbox-style pads read through XInput on Windows, HID everywhere else
Vector Match Engine

Vector Match Engine

Application · C# · Avalonia · .NET 8 · ML.NET · SQL Server

Finds the same person or company across two Excel sheets with no shared key and the names spelled differently.

  • Each row becomes a 512-dimension vector of character trigrams, so typos stay close
  • Every record in A scored against every one in B, above a threshold you set
  • Matched pairs side by side, exported to a formatted Excel workbook
ProjectJA

ProjectJA

Web application · C# · Blazor · .NET 10 · PostgreSQL

A lightweight Jira-style issue tracker, in the making, to run as SaaS or on your own server.

  • A drag-and-drop kanban board that updates live in every open browser
  • A database per tenant for SaaS, or one Docker stack on-prem
  • Full-text search, invites, single sign-on (OIDC) and an audit log
AVASdCanvas
AVASdCanvas screenshot

AVASdCanvas

Control · C# · Avalonia · .NET 9
On NuGet · v1.0.1 · 188 downloads

Structured drawing canvas that code can populate and users can interact with.

  • Graph-paper canvas of entities joined by arrowed connectors
  • Snap to grid, automatic placement, and dragging with live connectors
  • Click, double-click, right-click and hover events carry your metadata
AvaloniaDiagramerControl
AvaloniaDiagramerControl screenshot

AvaloniaDiagramerControl

Control · C# · Avalonia
On NuGet · v1.0.0 · 190 downloads

The VB.Net-era LineChart control, rebuilt for Windows, macOS and Linux.

  • Up to ten data series, with polynomial trend lines
  • Animated flashing to pick one series out of the rest
  • Grid, knot markers and banded backgrounds; every colour and font styleable
Avalonia3DCanvas
Avalonia3DCanvas screenshot

Avalonia3DCanvas

Control · C# · Avalonia · .NET 9
On NuGet · v1.0.0 · 226 downloads

3D object viewer for Avalonia and .NET 9.

  • Loads .3DS, .OBJ, .STL, .PLY and .FBX models
  • Wireframe drawing, centred and scaled to fit automatically
  • Smooth rotation on all three axes, at any speed
AvaloniaTimeLineControl
AvaloniaTimeLineControl screenshot

AvaloniaTimeLineControl

Control · C# · Avalonia
On NuGet · v1.0.1 · 329 downloads

Timeline control for Avalonia applications.

  • Up to ten timeline rows side by side
  • 30 chicklet styles: ten colours, each a box, a circle or a triangle
  • Wheel and keyboard scrolling, weekends, month labels and overlap markers
SyntaxColorizer
SyntaxColorizer screenshot

SyntaxColorizer

Control · C# · Avalonia · .NET 8 · NuGet
On NuGet · v1.0.2 · 524 downloads

Syntax-highlighting text box for Avalonia, with no dependencies beyond Avalonia itself.

  • Highlights 38 languages as you type, from C# and Rust to T-SQL and Mermaid
  • 14 built-in colour themes, and line numbers you can switch off
  • Linting with your own rules, and an MVVM-friendly design

On NuGet

Avalonia controls, ready to add to a project of your own: 7 packages, 2,080 downloads so far.

NuGet · v1.0.2 · .NET 8

SyntaxColorizer

A syntax highlighting TextBox control for Avalonia with support for 37 programming languages and 14 built-in color themes. Features real-time highlighting, line numbers, and linting infrastructure.

dotnet add package SyntaxColorizer
NuGet · v1.0.2 · .NET 9

LAWgrid

A highly customizable data grid control for Avalonia UI with built-in support for multiple databases including SQL Server, Oracle, MySQL, PostgreSQL, MongoDB, and DB2.

dotnet add package LAWgrid
NuGet · v1.0.1 · .NET 8

AvaloniaTimeLineControl

A powerful timeline visualization control for Avalonia applications.

dotnet add package AvaloniaTimeLineControl
NuGet · v1.0.0 · .NET 9

Avalonia3DCanvas

LWO) with automatic rotation and canvas resizing. Features wireframe rendering, customizable line colors and thickness, and smooth animation.

dotnet add package Avalonia3DCanvas
NuGet · v1.0.0 · .NET 9

AvaloniaDiagramerControl

A powerful, customizable multi-series line chart control for Avalonia UI applications.

dotnet add package AvaloniaDiagramerControl
NuGet · v1.0.1 · .NET 9

AVASdCanvas

An Avalonia canvas control for rendering structured diagrams with colorized labeled entities, connectors with configurable endpoints, a graph-paper grid background, drag-and-drop, hit testing, and arbitrary…

dotnet add package AVASdCanvas
NuGet · v0.1.1 · .NET 9

LawTreeView

An Avalonia tree-view control with drag-drop reordering, icons, selection, keyboard navigation, hover/selection styling, and a context menu.

dotnet add package LawTreeView

Day job

Healthcare records, reporting and code generation: the systems that pay for the arcade.

Behavioral health EHR · private repo

CARES

Electronic health records with reporting, records management and a web portal.

Query builder · private repo

Cares Query Reporter

Point-and-click database queries, with client-specific builds.

Data-access framework

CODE Complete

A database abstraction tool that grew into a full data-access code generator.

REST service

Code Generation API

CODE Complete's generation as a RESTful API for enterprise deployment.

Hall of fame

The originals, oldest first, and what each became here.

High scores

RankYearOriginalRebuilt as
1st1977Space WarsAVASpaceWars
2nd1978Space InvadersAVAInvaders
3rd1979AsteroidsAvaRoids
4th1979GalaxianAVAGalaxian
5th1979Lunar LanderAVALander
6th1979TailgunnerAVAGunner
7th1980BattlezoneAVAZone
8th1980BerzerkAVABerzerk
9th1980CentipedeAVACentipede
10th1980Missile CommandAVAMissile
11th1980Pac-ManAVAPacMan
12th1980PhoenixAVAPhoenix
13th1980Rally-XAVARallyX
14th1980Red BaronAVARedBaron
15th1980Star CastleAVACastle
16th1980WarlordsAVAWarlords
17th1981BosconianAVABosconian
18th1981DefenderAVADefend
19th1981Donkey KongAVAKong
20th1981FroggerAVAFrogger
21st1981GalagaAVAGalaga
22nd1981GorfAVAGorf
23rd1981Omega RaceAVARace
24th1981QixAVAQix
25th1981Satan's HollowAVASatansHollow
26th1981ScrambleAVAScramble
27th1981Space FuryAVASpaceFury
28th1981StargateAVAStargate
29th1981TempestAVATempest
30th1981VanguardAVAVanguard
31st1981Wizard of WorAVAWizardOfWor
32nd1981WizardryAVAWizardry
33rd1982Black WidowAVABlackWidow
34th1982BurgerTimeAVABurgerT
35th1982Dig DugAVADigDug
36th1982Donkey Kong Jr.AVADKongJr
37th1982GravitarAVAGravitar
38th1982JoustAVAJoust
39th1982Moon PatrolAVAMoonPatrol
40th1982Mr. Do!AVAMrDo
41st1982PengoAVAPengo
42nd1982Pole PositionAVAPolePosition
43rd1982Q*bertAVAQ-Bert
44th1982Robotron: 2084AVATron
45th1982TelengardAVAGard
46th1982Time PilotAVATimePilot
47th1982TronAVALightCycle
48th1982XeviousAVAXevious
49th1982ZaxxonAVAZaxxon
50th1983Archon: The Light and the DarkAVAArchon
51st1983Crystal CastlesAVACrystalCastles
52nd1983Elevator ActionAVAElevatorAction
53rd1983GyrussAVAGyruss
54th1983Lode RunnerAVALodeRunner
55th1983M.U.L.E.AVAMule
56th1983Major HavocAVAMajorHavoc
57th1983MappyAVAMappy
58th1983SinistarAVASinstar
59th1983Spy HunterAVASPYHunter
60th1983Star Trek: Strategic Operations SimulatorAVATrek
61st1983Star WarsAVAWars
62nd1983TapperAVATapper
63rd1983Ultima III: ExodusAVAUltima3
64th19841942AVA1942
65th1984EliteAVAElite
66th1984Kung-Fu MasterAVAKungFu
67th1984Marble MadnessAVAMarble
68th1984Seven Cities of GoldAVACitiesOfGold
69th1985GauntletAVAGauntlet
70th1985PaperboyAVAPaperboy
71st1985SargeAVASarge
72nd1985The Bard's TaleAVABardsTale
73rd1985Ultima IV: Quest of the AvatarAVAUltima4
74th1986ArkanoidAVAArkanoid
75th1986Bubble BobbleAVABubble
76th1986Party RPG classicAVAMMB1
77th1986RampageAVARampage
78th1986StarflightAVAFlight
79th1987Dungeon MasterAVADungeonMaster
80th1987Sid Meier's Pirates!AVAPirates
81st1988Pool of RadianceAVARadiance
82nd1990AngbandAVABand
83rd1991Sid Meier's CivilizationAVACiv
84th1993Master of OrionAVAOrion
85th2002Dungeon SiegeAVADungeonSeige

Player profile

I'm now an old architect in a small piece of a very large company that bought us about twelve years ago. I've been into computers since grade school in the late '70s, and I still like building things end to end.

At work I'm focused on modernization. At home it's local LLMs, single-board computers, and recreating the games that got me hooked, built from their documented behavior and released for every platform I can reach.

Lonnie Allen Watson
Class
Architect
Since
Late 1970s
Weapons
C#, .NET, Avalonia
GitHub
Harlock123
LinkedIn
lonnie-watson