SRB2 VS unknown-horizons

if you're a Sonic fan, you could play free games like Sonic Robo Blast 2 or Sonic and the Fallen Star which are great imo.

Sonic Robo Blast 2: https://www.srb2.org/

Godot does offer Constructive Solid Geometries that can be used for basic prototyping, and can be exported to Blender for additional work. https://docs.godotengine.org/en/stable/tutorials/3d/csg\_tools.html As an alternate engine, you could also consider Sonic Robo Blast 2 https://www.srb2.org/ as a possible engine to work in. Which has been stretched all the way into making a Kart Racer.

Here are a few free games I've played on my tv: C-Dogs SDL, Sonic Robo Blast 2

I would recommend Delta Touch (Doom engine ports), knights of the old republic 1 and 2 (both support mods on android), Sonic Robo Blast 2 (not on play store but at www.srb2.org ), Source Engine android port (portal, half-life 2, also not on play store but can easily be found by googling it)

Open Horizons (Anno-like?)

In case you didn't know about it you might be interested in contributing to https://unknown-horizons.org/

Unknown Horizons is inspired by the Anno series. Not exactly the same, but also a city builder with resource management.

Not mentioned yet:

Unknown Horizons https://unknown-horizons.org/

I suggest you google for "open source [genre]" or something like that. There are games like FreeCiv (Civilization 2 clone), FreeCol (Colonization clone), 0AD (medieval but maybe too much strategy oriented), Unknown Horizons (Anno clone) or Wildelands (Settler 1/2 clone).

OpenRCT2 UnReal World Unknown Horizons Freeciv Haven & Hearth

Unknown Horizons

0 A.D. , Unknown Horizons , NetHack , FreeOrion , Minetest